Stockholders' Equity Note [Abstract] Accumulated other comprehensive loss [Abstract] Accumulated other comprehensive loss [Abstract] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] components of accumulated other comprehensive income (loss) [Axis] components of accumulated other comprehensive income (loss) [Axis] components of accumulated other comprehensive income (loss) [Axis] components of accumulated other comprehensive income (loss) [Domain] components of accumulated other comprehensive income (loss) [Domain] [Domain] for components of accumulated other comprehensive income (loss) [Axis] Unrealized gains (losses) on derivative financial instruments designated as hedges Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Unrealized gains (losses) on available-for-sale investments Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] Foreign currency translation adjustments Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Activity in Accumulated Other Comprehensive Loss Class of Stock [Line Items] Accumulated other comprehensive income (loss) - beginning balance Accumulated Other Comprehensive Income (Loss), Net of Tax Other comprehensive (loss) income before reclassifications Other comprehensive income (loss) before reclassifications Other comprehensive income (loss) before reclassifications Amounts reclassified out of accumulated other comprehensive income (loss) Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax Net other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Accumulated other comprehensive income (loss) - ending balance Long-term Debt, Unclassified [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] February 2014 Term Loans February 2014 Term Loans [Member] February 2014 Term Loans March 2014 Term Loans March 2014 Term Loans [Member] March 2014 Term Loans [Member] Debt Instrument Debt Instrument [Line Items] 2017 Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 2018 Long-term Debt, Maturities, Repayments of Principal in Year Two 2019 Long-term Debt, Maturities, Repayments of Principal in Year Three 2020 Long-term Debt, Maturities, Repayments of Principal in Year Four Total Long-term Debt, Gross Related Party Transactions [Abstract] RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] LONG-TERM DEBT Long-term Debt [Text Block] Equity [Abstract] Dividends, Common Stock Dividends, Common Stock Treasury stock, (in shares) Treasury Stock, Shares Treasury stock, cost Treasury Stock, Value Number of shares of common stock repurchased (in shares) Stock Repurchased During Period, Shares Cost of shares of common stock repurchased Stock Repurchased During Period, Value Debt Disclosure [Abstract] Debt Conversion Scenario [Axis] Debt Conversion Scenario [Axis] Debt Conversion Scenario [Axis] Debt Conversion Scenario [Domain] Debt Conversion Scenario [Domain] [Domain] for Debt Conversion Scenario [Axis] Conversion Scenario One Conversion Scenario One [Member] First scenario providing for potential conversion of convertible notes. Conversion Scenario Two Conversion Scenario Two [Member] Second scenario providing for potential conversion of convertible notes. 1.50% Convertible Senior Notes Convertible Notes Payable [Member] Principal Amount - 1.50% Convertible Senior Notes Debt Instrument, Face Amount Coupon Interest Rate Debt Instrument, Interest Rate, Stated Percentage Proceeds from issuance of convertible notes, net of issuance costs Proceeds from Debt, Net of Issuance Costs 1.50% Convertible Notes - Base Principal Amount For Conversion Rate Convertible Notes Base Principal Amount For Conversion Rate Represents the base principal amount of convertible notes against which the conversion rate is applied for purposes of determining the number of common shares into which the notes are convertible. 1.50% Convertible Notes - Conversion Ratio Debt Instrument, Convertible, Conversion Ratio 1.50% Convertible Notes - Conversion Price (in dollars per share) Debt Instrument, Convertible, Conversion Price 1.50% Convertible Notes - Number of Common Shares (in shares) Debt Instrument, Convertible, Number of Equity Instruments 1.50% Convertible Notes - Threshold Trading Days Debt Instrument, Convertible, Threshold Trading Days 1.50% Convertible Notes - Window of Consecutive Trading Days Debt Instrument, Convertible, Threshold Consecutive Trading Days 1.50% Convertible Notes - Threshold Percentage for Conversion Trigger Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger 1.50% Convertible Notes - Carrying Value Convertible Notes Payable Assumed Noncovertible Debt Interest Rate Assumed Noncovertible Debt Interest Rate Represents the assumed noncovertible debt interest rate used to determine the issue-date fair value of the liability component of convertible debt that contains a cash settlement feature. 1.50% Convertible Notes - Carrying Value of Equity Component Debt Instrument, Convertible, Carrying Amount of Equity Component Debt Issuance Costs Debt Issuance Cost Common stock issuance costs Adjustment To Additional Paid In Capital Debt Issuance Cost The carrying amount of the equity component of debt issuance costs. Convertible Notes Payable, Noncurrent Convertible Notes Payable, Noncurrent Unamortized debt discount Debt Instrument, Unamortized Discount Unamortized Debt Issuance Expense Unamortized Debt Issuance Expense Effective Interest Rate Debt Instrument, Interest Rate, Effective Percentage Common Stock, Number of Shares and Other Disclosures Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] Common stock issued in public offering (in shares) Stock Issued During Period, Shares, New Issues Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Debt Instrument Variable Rate Base [Axis] Debt Instrument Variable Rate Base [Axis] The alternative reference rates that may be used to calculate the variable interest rate of the debt instrument. Debt Instrument Variable Rate Base [Domain] Debt Instrument Variable Rate Base [Domain] Identification of the reference rate that is used to calculate the variable interest rate of the debt instrument. Base Rate Debt Instrument Variable Rate Base [Member] Represents the base rate used to calculate the variable interest rate of the debt instrument. Adjusted LIBO Rate Debt Instrument Variable Rate Base Adjusted LIBO [Member] Represents the adjusted LIBO rate used to calculate the variable interest rate of the debt instrument. Line of Credit Facility [Axis] Lender Name [Axis] Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] 2013 Amended Credit Agreement 2013 Amended Credit Agreement [Member] Represents the entity's 2013 Amended Credit Agreement, entered into in March 2013 [Member] March 2013 Term Loans March 2013 Term Loans [Member] March 2013 Term Loans [Member] Base Rate loans Base Rate Loans [Member] Represents the Base Rate loans under the Credit Agreement. Eurodollar loans Eurodollar Loans [Member] Represents the Eurodollar loans under the Credit Agreement. Debt instrument, description of variable rate basis Debt Instrument, Description of Variable Rate Basis Interest rate margin (as a percent) Debt Instrument, Basis Spread on Variable Rate Fair Value Disclosures [Abstract] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value by Liability Class [Axis] Liability Class [Axis] Fair Value, Liabilities, Measured on Recurring Basis, Unobservable Input Reconciliation, by Liability Class [Domain] Fair Value by Liability Class [Domain] Liability for contingent consideration Contingent Consideration [Member] Represents potential amounts payable by the entity as contingent consideration in connection with a business acquisition. Liability for contingent consideration measured using significant unobservable inputs (Level 3) Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Changes in the estimated fair value of liability for contingent consideration measured using significant unobservable inputs (Level 3) Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair value measurement at the beginning of the period Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value Contingent consideration liabilities recorded for business combinations Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Changes in fair values, recorded in operating expenses Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Payments of contingent consideration Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Foreign currency translation and other Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Fair value measurement at the end of the period Discount rates (as a percent) Fair Value Inputs, Discount Rate Segment Reporting [Abstract] SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION Segment Reporting Disclosure [Text Block] Cash, Cash Equivalents, and Short-term Investments [Abstract] Schedule of Cash, Cash Equivalents and Short-term Investments [Table] Schedule of Available-for-sale Securities [Table] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Cash and bank time deposits Cash [Member] Money market funds Money Market Funds [Member] Commercial paper and corporate debt securities (available-for-sale) Corporate Debt Securities [Member] Commercial Paper Commercial Paper [Member] Total cash and cash equivalents Cash and Cash Equivalents [Member] Debt Security [Axis] Debt Security [Axis] Major Types of Debt Securities [Domain] Major Types of Debt Securities [Domain] Bank time deposits Bank Time Deposits [Member] Total short-term investments Short-term Investments [Member] Schedule of Available-for-sale Securities Schedule of Available-for-sale Securities [Line Items] Cost Basis Available-for-sale Securities, Amortized Cost Basis Gross unrealized gains Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax Gross unrealized losses Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax Estimated Fair Value Cash and Cash Equivalents, Fair Value Disclosure Estimated Fair Value Available-for-sale Securities Gains (losses) on sales of available-for-sale securities Available-for-sale Securities, Gross Realized Gain (Loss) Proceeds from sales and maturities of available-for-sale securities Proceeds from Sale and Maturity of Available-for-sale Securities Available-for-sale Securities in unrealized loss positions Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Commitments and Contingencies Disclosure [Abstract] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Statement, Geographical [Axis] Geographical [Axis] Segment, Geographical [Domain] Geographical [Domain] United States UNITED STATES Other Americas Regions Other Americas Region [Member] Represents the Americas geographical region, other than the United States Americas Americas [Member] EMEA EMEA [Member] APAC APAC [Member] Represents the Asia-Pacific region Israel ISRAEL Other countries Geographical Groups of Countries, Other [Member] Geographical Groups of Countries, Other [Member] Revenues from External Customers and Long-Lived Assets Revenues from External Customers and Long-Lived Assets [Line Items] Property and equipment, net Property, Plant and Equipment, Net Revenue Revenues Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Contact Solutions, LLC [Member] Contact Solutions, LLC [Member] Contact Solutions, LLC [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Payment Made At Closing To Acquire Businesses Payment Made At Closing To Acquire Businesses Payment Made At Closing To Acquire Businesses Earnings Per Share [Abstract] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Statement Statement [Line Items] Exercise Price of Warrants (in dollars per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Income Tax Disclosure [Abstract] Components of Income Tax Expense (Benefit), Continuing Operations [Abstract] Components of Income Tax Expense (Benefit), Continuing Operations [Abstract] Income Tax Expense (Benefit), Continuing Operations [Abstract] Income Tax Expense (Benefit), Continuing Operations [Abstract] Current provision (benefit) for income taxes Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Current Federal Tax Expense (Benefit) State Current State and Local Tax Expense (Benefit) Foreign Current Foreign Tax Expense (Benefit) Total current provision for income taxes Current Income Tax Expense (Benefit) Deferred (benefit) provision for income taxes Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Deferred Federal Income Tax Expense (Benefit) State Deferred State and Local Income Tax Expense (Benefit) Foreign Deferred Foreign Income Tax Expense (Benefit) Total deferred (benefit) provision for income taxes Deferred Income Tax Expense (Benefit) Total provision (benefit) for income taxes Income Tax Expense (Benefit) Statement of Financial Position [Abstract] Allowance for Doubtful Accounts Allowance for Doubtful Accounts Receivable, Current Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, issued (in shares) Preferred Stock, Shares Issued Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, authorized (in shares) Common Stock, Shares Authorized Common stock, issued (in shares) Common Stock, Shares, Issued Common stock, outstanding (in shares) Common Stock, Shares, Outstanding Valuation and Qualifying Accounts Disclosure [Table] Valuation and Qualifying Accounts Disclosure [Table] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves [Domain] Valuation Allowances and Reserves [Domain] Valuation Allowance of Deferred Tax Assets Valuation Allowance of Deferred Tax Assets [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Provision (benefit) for income taxes Provision (benefit) for income taxes [Member] Provision (benefit) for income taxes [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Additional Paid-in Capital Additional Paid-in Capital [Member] Other Comprehensive Income Location [Axis] Other Comprehensive Income Location [Axis] Other Comprehensive Income Location [Domain] Other Comprehensive Income Location [Domain] Other comprehensive income (loss) Other Comprehensive Income (Loss) [Member] Valuation and Qualifying Accounts Disclosure [Line Items] Valuation and Qualifying Accounts Disclosure [Line Items] Windfall Tax Benefits Included in Provision for Income Taxes Windfall Tax Benefits Included in Provision for Income Taxes Represents the amount of windfall income tax benefits related to stock-based compensation which are included in the provision for income taxes. Recorded valuation allowance Movement in Valuation Allowances and Reserves [Roll Forward] Balance at beginning of year Valuation Allowances and Reserves, Balance Adjustments to Valuation Allowances Valuation Allowances and Reserves, Adjustments Business combinations Valuation Allowances and Reserves, Reserves of Businesses Acquired Balance at end of year Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Subsequent Event Subsequent Event [Member] Award Date [Axis] Award Date [Axis] Award Date [Domain] Award Date [Domain] 2017 Plan 2017 Plan [Member] 2017 Plan [Member] Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] Combined Stock Bonus Program and Bonus Share Program Combined Stock Bonus Program and Bonus Share Program [Member] Represents combined Stock Bonus Program and Bonus Share Program amounts Stock Bonus Program Stock Bonus Program [Member] Represents the information pertaining to Stock Bonus Program under which eligible employees may receive a portion of their bonus in the form of fully vested shares of common stock. Stock-Based Compensation Plans Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Vesting period for executive officers (in years) Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Trailing period of average price of common stock to determine the number of shares to be issued (in days) Share-based Compensation Arrangement by Share-based Payment Award, Determination of Shares Issuable Trailing Period of Average Price of Common Stock Represents the trailing period of average price of common stock to determine the number of shares to be issued under the share-based compensation plan. Stock Bonus Program, number of shares authorized Stock Bonus Program, Number of Shares Authorized Stock Bonus Program, Number of Shares Authorized Discount from market price (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Purchase Date Shares in lieu of cash bonus - granted and released Stock Issued During Period, Shares, Issued for Services Shares granted in respect of discount Shares Granted in Respect of Discount Represents the number of shares of common stock granted to plan participants in respect of discount provided under share-based compensation plan. Shares released in respect of discount Shares Released in Respect of Discount Represents the number of shares of common stock that were granted and to plan participants, and released, in respect of discount provided under share-based compensation plan. Total accrued liability Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent Shares issued, price per share Shares Issued, Price Per Share Proceeds from public issuance of common stock Proceeds from Issuance of Common Stock Payments of Stock Issuance Costs Payments of Stock Issuance Costs Cash, Cash Equivalents and Short-term Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Selected Quarterly Financial Information [Abstract] Quarterly Financial Information Explanatory Details [Abstract] Quarterly Financial Information Explanatory Details [Abstract] Change in valuation allowance Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Losses on early retirements of debt Gains (Losses) on Extinguishment of Debt Research and Development [Abstract] RESEARCH AND DEVELOPMENT, NET Research, Development, and Computer Software Disclosure [Text Block] Business Combinations [Abstract] BUSINESS COMBINATIONS Business Combination Disclosure [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Prepaid expenses and other current assets Prepaid Expenses and Other Current Assets [Member] Other liabilities Other Noncurrent Liabilities [Member] Derivative Instrument Risk [Axis] Derivative Instrument [Axis] Derivative Contract Type [Domain] Derivative Contract [Domain] Foreign currency forward contracts Foreign Exchange Forward [Member] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Derivative designated as hedging instruments Designated as Hedging Instrument [Member] Derivative not designated as hedging instruments Not Designated as Hedging Instrument [Member] Fair Values of Derivative Financial Instruments Derivatives, Fair Value [Line Items] Term to maturity of derivative contracts is generally less than this period (in months) Derivative, Lower Remaining Maturity Range Derivative, Notional Amount Derivative, Notional Amount Assets, Fair Value Derivative Asset, Fair Value, Gross Asset Liabilities, Fair Value Derivative Liability, Fair Value, Gross Liability Subsequent Events Subsequent Events [Text Block] STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS [Abstract] STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS [Abstract] 401(k) Plan and Other Retirement Plans Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract] Minimum age required to participate in 401(k) plan (in years) Defined Contribution Plan Requisite Age of Eligible Employees Represents the minimum age required to participate in the entity's defined contribution retirement plan. Employee contribution limit (as a percentage of compensation) Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Company's matching contribution as percentage of employee's annual compensation (as a percentage of compensation) Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Defined Contribution Plan Employer Matching Contribution Per Employee Maximum Amount Defined Contribution Plan Employer Matching Contribution Per Employee Maximum Amount Maximum amount per employee for which the employer contributes a matching contribution to a defined contribution plan. Matching contribution expense Defined Contribution Plan, Cost Recognized Liability for Severance Pay Restructuring Charges [Abstract] Severance expenses Severance Costs 2011 Credit Agreement 2011 Credit Agreement [Member] Represent's the Entity's 2011 Credit Agreement, entered into in April 2011 [Member] April 2011 Term Loans April 2011 Term Loans [Member] April 2011 Term Loans 2011 Revolving Line of Credit 2011 Revolving Line of Credit [Member] 2011 Revolving Line of Credit Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Maximum Borrowing Capacity Long-term Debt, Gross Line of Credit Facility, Additional Borrowing Capacity Line of Credit Facility, Current Borrowing Capacity MERGER AGREEMENT WITH CTI [Abstract] MERGER AGREEMENT WITH CTI [Abstract] Merger Agreement with CTI - Consolidated Financial Statement Impact [Abstract] Merger Agreement with CTI - Consolidated Financial Statement Impact [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Related Party Transactions, by Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] CTI Merger CTI Merger [Member] CTI Merger [Member] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Series A Preferred Stock Series A Preferred Stock [Member] Business Acquisition Business Acquisition [Line Items] Temporary Equity, Carrying Amount, Attributable to Parent Temporary Equity, Carrying Amount, Attributable to Parent CTI's net assets at closing Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) by Hedging Relationship [Axis] Hedging Relationship [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Cash flow hedging Cash Flow Hedging [Member] DERIVATIVE FINANCIAL INSTRUMENTS Derivative Instruments, Gain (Loss) [Line Items] Net (losses) gains recognized in Other comprehensive (loss) income Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net Net (losses) gains reclassified from Other comprehensive (loss) income to the consolidated statements of operations Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Gains (losses) from ineffectiveness Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net Foreign currency forward contracts underlying net losses recorded in accumulated other comprehensive loss expected to be reclassified into earnings within the next twelve months Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months Gains recognized Derivative, Gain on Derivative Accounting Policies [Abstract] Cost of Revenue [Abstract] Maximum period of time for recognizing revenue for deferred cost of revenue classified as current (in months) Deferred Cost of Revenue Classification Current Maximum number of months for recognizing deferred revenue in order for the related deferred cost of revenue to be classified as a current asset. Property, Plant and Equipment [Abstract] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment by Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Software Development Costs Software Development [Member] Internal-Use Software Internal Use Software [Member] Purchased software applications and internally developed software for internal use. Software Development Costs Property, Plant and Equipment [Line Items] Estimated useful lives, (in years) Property, Plant and Equipment, Useful Life SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) Quarterly Financial Information [Text Block] INCOME TAXES Income Tax Disclosure [Text Block] Movement in Capitalized Computer Software, Net [Roll Forward] Movement in Capitalized Computer Software, Net [Roll Forward] Capitalized software development costs, net - beginning of the period Capitalized Computer Software, Net Software development costs capitalized during the year Capitalized Computer Software, Additions Amortization of capitalized software development costs Capitalized Computer Software, Amortization Impairments, foreign currency translation and other Capitalized Computer Software Foreign Currency Translation and Other Foreign currency translation and other adjustments made to capitalized computer software costs during the period. Capitalized software development costs, net - end of the period Capitalized Computer Software, Impairments Capitalized Computer Software, Net [Abstract] Capitalized Computer Software, Impairments Capitalized Computer Software, Impairments Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Customer Relationships Customer Relationships [Member] Acquired Technology Developed Technology Rights [Member] Trademarks and Trade Names Trademarks and Trade Names [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Series of Individually Immaterial Business Acquisitions Series of Individually Immaterial Business Acquisitions [Member] Estimated useful lives of finite-lived intangible assets (in years) Finite-Lived Intangible Asset, Useful Life Weighted-average estimated useful life of all finite-lived identifiable intangible assets (in years) Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Adjustments for New Accounting Pronouncement Adjustments for New Accounting Pronouncement [Member] Revolving Credit Facility Revolving Credit Facility [Member] Equipment, Furniture and Other Equipment, Furniture and Other [Member] Equipment, furniture and other tangible property. Software Computer Software, Intangible Asset [Member] Buildings Building [Member] Property, Plant and Equipment Goodwill and Intangible Assets [Abstract] Number of primary approaches to assess fair value Impairment Test Number of Primary Approaches to Assess Fair Value Represents the number of primary approaches to assess fair value in impairment test. NET INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. Earnings Per Share [Text Block] Income Statement [Abstract] Statement [Table] Statement [Table] Statement, Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Revenue: Revenues [Abstract] Product Sales Revenue, Goods, Net Service and support Sales Revenue, Services, Net Total revenue Cost of revenue: Product Cost of Goods Sold Service and support Cost of Services Amortization of acquired technology and backlog Amortization of Acquired Intangible Assets Technology The aggregate expense charged against earnings to allocate the cost of technology acquired intangible assets. As a noncash expense, this element is added back to net income when calculating cash provided by (used in) operations using the indirect method. Total cost of revenue Cost of Revenue Gross profit Gross Profit Operating expenses: Operating Expenses [Abstract] Research and development, net Research and Development Expense Selling, general and administrative Selling, General and Administrative Expense Amortization of other acquired intangible assets Amortization of Acquired Intangible Assets Other The aggregate expense charged against earnings to allocate the cost of other acquired intangible assets. As a noncash expense, this element is added back to net income when calculating cash provided by (used in) operations using the indirect method. Total operating expenses Operating Expenses Operating income Operating Income (Loss) Other income (expense), net: Nonoperating Income (Expense) [Abstract] Interest income Investment Income, Interest Interest expense Interest Expense Losses on early retirements of debt Other expense, net Other Nonoperating Income (Expense) Total other expense, net Nonoperating Income (Expense) Income before provision (benefit) for income taxes Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Provision (benefit) for income taxes Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income attributable to noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest Net income attributable to Verint Systems Inc. Net Income (Loss) Attributable to Parent Dividends on preferred stock Preferred Stock Dividends, Income Statement Impact Net income attributable to Verint Systems Inc. common shares Net Income (Loss) Available to Common Stockholders, Basic Net income per common share attributable to Verint Systems Inc. Basic (in dollars per share) Earnings Per Share, Basic Diluted (in dollars per share) Earnings Per Share, Diluted Weighted-average common shares outstanding Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Line of Credit Facility Covenant Period [Axis] Line of Credit Facility Covenant Period [Axis] Information about the line of credit facility covenant period. Line of Credit Facility Covenant Period [Domain] Line of Credit Facility Covenant Period [Domain] The line of credit facility covenant period. Line of Credit Facility Covenant Period Until January 2016 Line of Credit Facility Covenant Period Until January 2016 [Member] Line of Credit Facility Covenant Period Until January 2016 Line of Credit Facility Covenant Period January 2016 Thereafter Line of Credit Facility Covenant Period January 2016 Thereafter [Member] Line of Credit Facility Covenant Period January 2016 Thereafter 2013 Amended Credit Agreement - 2014 Amendments 2013 Amended Credit Agreement - 2014 Amendments [Member] 2013 Amended Credit Agreement - 2014 Amendments [Member] 2013 Revolving Line of Credit 2013 Revolving Line of Credit [Member] 2013 Revolving Line of Credit Proceeds from Lines of Credit Proceeds from Lines of Credit Proceeds from Issuance of Debt Proceeds from Issuance of Debt Repayments of Debt Repayments of Debt Term Loans Medium-term Notes Unamortized deferred costs Deferred Finance Costs, Net Consolidated Total Debt to Consolidated EBITDA Ratio Consolidated Total Debt to Consolidated EBITDA Ratio Represents the Consolidated Total Debt to Consolidated EBITDA (each as defined in the Credit Agreement) leverage ratio. Goodwill and Intangible Assets Disclosure [Abstract] Intangible Assets - Future Amortization [Abstract] Intangible Assets - Future Amortization [Abstract] 2017 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2018 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Five Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Intangible assets with finite lives, Net Finite-Lived Intangible Assets, Net Schedule of fair values of derivative financial instruments Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of the effects of derivative financial instruments designated as cash flow hedging instruments Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of gains recognized on derivative financial instruments not designated as hedging instruments Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Cost of revenue - product Cost of Goods Sold [Member] The allocation (or location) of expense to (in) cost of goods sold. Cost of revenue - service and support Cost of Services [Member] The allocation (or location) of expense to (in) cost of services. Research and development, net Research and Development Expense [Member] Selling, general and administrative Selling General and Administrative Expense [Member] The allocation (or location) of expense to (in) selling, general and administrative expense. Allocated share-based compensation expense Allocated Share-based Compensation Expense Income tax benefits related to stock-based compensation (before consideration of valuation allowances) Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Total stock-based compensation, net of taxes Allocated Share-based Compensation Expense, Net of Tax Risks and Uncertainties [Abstract] Concentration Risk [Table] Concentration Risk [Table] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Credit Concentration Risk Credit Concentration Risk [Member] Concentration Risk [Line Items] Concentration Risk [Line Items] Accounts Receivable, Net Accounts Receivable, Net Concentration Risk, Customer Concentration Risk, Customer Derivative [Table] Derivative [Table] Interest Rate Swap Interest Rate Swap [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] London Interbank Offered Rate (LIBOR) London Interbank Offered Rate (LIBOR) [Member] Derivative [Line Items] Derivative [Line Items] Derivative, Fixed Interest Rate Derivative, Fixed Interest Rate Derivative, Exchange Rate Floor Derivative, Exchange Rate Floor Derivative, Basis Spread on Variable Rate Derivative, Basis Spread on Variable Rate Derivative, Inception Date Derivative, Inception Date Derivative, Maturity Date Derivative, Maturity Date Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Balance sheet classification of award [Axis] Balance sheet classification of award [Axis] Balance sheet classification of award [Axis] Balance sheet classification of award [Domain] Balance sheet classification of award [Domain] [Domain] for Balance sheet classification of award [Axis] Equity-classified awards Equity Classified Awards [Member] Represents the equity-classified awards under the share-based compensation plan. Total equity-settled awards Equity-Settled Awards [Member] Equity-Settled Awards [Member] Other liability-classified awards Liability Classified Awards [Member] Represents the liability-classified awards under the share-based compensation plan. Stock-based compensation expense Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Net income Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Provision for doubtful accounts Provision for Doubtful Accounts Stock-based compensation - equity portion Share-based Compensation Amortization of discount on convertible notes Accretion Expense (Benefit) provision for deferred income taxes Excess tax benefits from stock award plans Excess Tax Benefit from Share-based Compensation, Operating Activities Non-cash gains on derivative financial instruments, net Unrealized Gain (Loss) on Derivatives Other non-cash items, net Other Noncash Income (Expense) Changes in operating assets and liabilities, net of effects of business combinations: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Inventories Increase (Decrease) in Inventories Deferred cost of revenue Increase (Decrease) in Deferred Charges Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Deferred revenue Increase (Decrease) in Deferred Revenue Other liabilities Increase (Decrease) in Other Operating Liabilities Other, net Increase (Decrease) in Other Operating Assets and Liabilities, Net Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Cash paid for business combinations, including adjustments, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Purchases of investments Payments to Acquire Investments Sales and maturities of investments Proceeds from Sale, Maturity and Collection of Investments Settlements of derivative financial instruments not designated as hedges Payments for (Proceeds from) Derivative Instrument, Investing Activities Cash paid for capitalized software development costs Payments for Software Change in restricted cash and bank time deposits, including long-term portion Increase (Decrease) in Restricted Cash and Investments Other investing activities Payments for (Proceeds from) Other Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Proceeds from borrowings, net of original issuance discount Proceeds from Issuance of Long-term Debt and Capital Securities, Net Repayments of borrowings and other financing obligations Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities Proceeds from issuance of warrants Proceeds from Issuance of Warrants Payments for convertible note hedges Payments for Hedge, Financing Activities Payments of equity issuance, debt issuance and other debt-related costs Payments of Debt Issuance Costs Proceeds from exercises of stock options Proceeds from Stock Options Exercised Cash received in CTI Merger Cash Acquired from Acquisition Dividends paid to noncontrolling interest Payments of Ordinary Dividends, Noncontrolling Interest Purchases of treasury stock Payments for Repurchase of Common Stock Excess tax benefits from stock award plans Excess Tax Benefit from Share-based Compensation, Financing Activities Payments of contingent consideration for business combinations (financing portion) Business Combination, Contingent Consideration Arrangements, Payment of Contingent Consideration Business Combination, Contingent Consideration Arrangements, Payment of Contingent Consideration Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash and Cash Equivalents, Continuing Operations Net increase (decrease) in cash and cash equivalents Net Cash Provided by (Used in) Continuing Operations Cash and cash equivalents, beginning of period Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents, end of period Schedule of Goodwill [Table] Schedule of Goodwill [Table] Business Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Enterprise Intelligence Enterprise Intelligence Solutions [Member] Represents the Enterprise Intelligence Solutions reportable segment of the entity. Cyber Intelligence Communications and Cyber Intelligence Solutions [Member] Represents the Communications and Cyber Intelligence Solutions reportable segment of the entity. Video Intelligence Video and Situation Intelligence Solutions [Member] Represents the Video and situation intelligence solutions reportable segment of the entity. Goodwill activity Goodwill [Line Items] Goodwill, gross at the beginning of the period Goodwill, Gross Accumulated impairment losses Goodwill, Impaired, Accumulated Impairment Loss Goodwill, net at the beginning of the period Goodwill Business combinations Goodwill, Acquired During Period Foreign currency translation and other Goodwill, Translation and Purchase Accounting Adjustments Goodwill, net, at the end of the period Goodwill Impairments Goodwill, Impaired [Abstract] Impairments of goodwill Goodwill, Impairment Loss UTX Acquisition UTX Acquisition [Member] UTX Acquisition on March 31, 2014 [Member] Payments to Acquire Businesses, Gross Payments to Acquire Businesses, Gross Business Acquisition Contingent Consideration Fair Value Disclosure Business Acquisition Contingent Consideration Fair Value Disclosure Fair value, as of the balance sheet date, of potential payments under the contingent consideration arrangement including cash and shares. Fair value of contingent obligation Business Combination, Consideration Transferred, Liabilities Incurred Transaction and Related Costs, Including Integration Costs Business Acquisition, Cost of Acquired Entity, Transaction Costs During Period Business Acquisition, Cost of Acquired Entity, Transaction Costs During Period Stock options Employee Stock Option [Member] Intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Cash received from the exercise of stock options Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options Tax benefits realized from stock options exercised Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options Fair value of options vested Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value Stock Repurchase Program, Authorized Amount Stock Repurchase Program, Authorized Amount Investments [Abstract] Minimum maturity period of short term investments in time deposits (in days) Minimum maturity period of short term investments in time deposits (in months) Minimum maturity period of short term investments in time deposits (in months) Summary of long-term debt Schedule of Long-term Debt Instruments [Table Text Block] Summary of future scheduled principal payments on term loans Schedule of Maturities of Long-term Debt [Table Text Block] Schedule of components of interest expense Schedule of Components of Interest Expense [Table Text Block] Schedule of Components of Interest Expense Research and Development Expense [Abstract] Research and Development Expense [Abstract] Gross research and development expenses Research and Development Expenses, Gross Represents the gross amount of research and development costs incurred before netting of any grants or reimbursements received Grants from OCS and other government programs recorded as a reduction in gross research and development expenses Revenue from Grants Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Organization, Consolidation and Presentation of Financial Statements [Abstract] Schedule of Inventories Schedule of Inventory, Current [Table Text Block] Schedule of Property and Equipment, net Property, Plant and Equipment [Table Text Block] Schedule of Other Assets Schedule of Other Assets, Noncurrent [Table Text Block] Schedule of Accrued Expenses and Other Current Liabilities Schedule of Accrued Liabilities [Table Text Block] Schedule of Other Liabilities Schedule of Other Liabilities Noncurrent [Table Text Block] Tabular disclosure of noncurrent liabilities. Schedule of Other Expense, Net Schedule of Other Nonoperating Income (Expense) [Table Text Block] Schedule of Supplemental Information Regarding Consolidated Cash Flows Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Unbilled Receivables, Not Billable, Fiscal Year Maturity [Abstract] Unbilled Receivables, Not Billable, Amount Expected to be Collected in Next Twelve Months Unbilled Receivables, Not Billable, Amount Expected to be Collected in Next Twelve Months Allowance for Doubtful Accounts Schedule of Credit Losses for Financing Receivables, Current [Table Text Block] Principles of Consolidation Consolidation, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Restricted Cash and Bank Time Deposits Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Investments Investment, Policy [Policy Text Block] Accounts Receivable, Net Trade and Other Accounts Receivable, Policy [Policy Text Block] Concentrations of Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Allowance for Doubtful Accounts Receivables, Trade and Other Accounts Receivable, Allowance for Doubtful Accounts, Policy [Policy Text Block] Inventories Inventory, Policy [Policy Text Block] Property and Equipment, net Property, Plant and Equipment, Policy [Policy Text Block] Goodwill, Other Acquired Intangible Assets, and Long-Lived Assets Goodwill and Intangible Assets, Policy [Policy Text Block] Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Fair Values of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Derivative Financial Instruments Derivatives, Policy [Policy Text Block] Segment Reporting Segment Reporting, Policy [Policy Text Block] Revenue Recognition Revenue Recognition, Policy [Policy Text Block] Cost of Revenue Cost of Sales, Policy [Policy Text Block] Research and Development, net Research and Development Expense, Policy [Policy Text Block] Software Development Costs Software to be Sold, Leased, or Otherwise Marketed, Policy [Policy Text Block] Internal-Use Software Internal Use Software, Policy [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Functional Currencies and Foreign Currency Transaction Gains and Losses Foreign Currency Transactions and Translations Policy [Policy Text Block] Stock-Based Compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Net Income Per Common Share Attributable to Verint Systems Inc. Earnings Per Share, Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Net Income Per Common Share Attributable to Verint Systems Inc. [Abstract] Net Income Per Common Share Attributable to Verint Systems Inc. [Abstract] Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Dilutive effect of employee equity award plans (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Dilutive effect of 1.50% convertible senior notes (in shares) Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities Dilutive effect of warrants (in shares) Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants Diluted (in shares) KANA Software Inc. KANA Software Inc. [Member] KANA Software Inc. Cash Acquired from Acquisition Post-closing purchase price adjustment Post-closing purchase price adjustment Post-closing purchase price adjustment that increased (decreased) the cash portion of the acquisition price. Payments to Acquire Businesses, Net of Cash Acquired Deferred Revenue - Current and Long-Term Deferred Revenue - Current and Long-Term Represents the combined amounts of current and long-term deferred revenue. Intangible Asset - Undelivered Performance Obligations Intangible Asset - Undelivered Performance Obligations Represents the fair value of undelivered performance obligations assumed in a business combination for which payment has not yet been received (backlog). Number of reporting segments Number of Reportable Segments INTANGIBLE ASSETS AND GOODWILL Goodwill and Intangible Assets Disclosure [Text Block] SUPPLEMENTAL CONSOLIDATED FINANCIAL STATEMENT INFORMATION Additional Financial Information Disclosure [Text Block] Activity of capitalized software development costs Schedule of Research and Development Assets Acquired Other than Through Business Combination [Table Text Block] MERGER WITH CTI Mergers, Acquisitions and Dispositions Disclosures [Text Block] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Segment Contribution Operating Segments [Member] Unallocated Segment Reconciling Items [Member] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating results by segment Segment Reporting Information [Line Items] Revenue adjustments Segment Revenue Adjustments Represents segment revenue adjustments related to deferred revenue of acquired companies. Total revenue Reconciliation of segment contribution to operating income Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract] Amortization of acquired intangible assets Amortization of Intangible Assets Other unallocated expenses Other Cost and Expense, Operating Operating income Other expense, net Income before provision (benefit) for income taxes Revenue Recognition [Abstract] Number of Categories in which Revenue is Derived and Reported Number of Categories in which Revenue is Derived and Reported Represents the number of categories in which revenue is derived and reported. Number of elements for multiple-element software arrangements for which various available indicators of fair value and judgment are used to classify the arrangement's revenue into product revenue and service revenue, VSOE cannot be established and where such arrangements are recognized ratably, minimum Revenue Recognition Multiple Deliverable Arrangements Allocation to Specific Unit of Accounting Number of Elements Unable to Establish Vendor Specific Objective Evidence Minimum for Use of Available Fair Value Indicators The minimum number of elements for multiple-element software arrangements for which the entity uses various available indicators of fair value and judgment to classify the arrangement's revenue into product revenue and service revenue when it is unable to establish vendor-specific objective evidence (VSOE) and where such arrangements are recognized ratably. Term of software maintenance period over which PCS revenue is recognized (in years) Software Maintenance, Period Represents the term of the software maintenance period over which the related post-contract customer support (PCS) is recognized. Estimated economic lives of software products, low end of range (in years) Software Products Estimated Economic Lives Low End of Range Represents the low end of the range of estimated economic lives of software products. Estimated economic lives of software products, high end of range (in years) Software Products Estimated Economic Lives High End of Range Represents the high end of the range of estimated economic lives of software products. Commitment fee on undrawn portion (as a percent) Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Write Off of Deferred Debt Issuance Costs Resulting From Early Debt Payment Write Off Deferred Debt Issuance Costs Resulting From Early Debt Payment Represents the write off deferred debt issuance costs as a result of early debt principal payments. Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Stock options and restricted stock-based awards Stock Compensation Plan [Member] 1.50% convertible senior notes Convertible Debt [Member] Warrants Warrant [Member] Preferred Stock Convertible Preferred Stock [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share, (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Accounting Changes and Error Corrections [Abstract] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle New Accounting Pronouncements or Change in Accounting Principle [Line Items] STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock option activity Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Expired (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Ending balance (in shares) Stock options exercisable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Weighted-Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award Options Weighted Average Exercise Price [Abstract] Beginning balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Forfeited (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Expired (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Ending balance (in dollars per share) Stock options exercisable (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] 2017 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2018 Operating Leases, Future Minimum Payments, Due in Two Years 2019 Operating Leases, Future Minimum Payments, Due in Three Years 2020 Operating Leases, Future Minimum Payments, Due in Four Years 2021 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Operating Leases, Future Minimum Payments Due Operating Leases, Future Minimum Payments Due Combined February 2014 and March 2014 Term Loans Combined February 2014 and March 2014 Term Loans [Member] Combined activity for the February 2014 and March 2014 Term Loans. Repayments of Long-Term Debt Proceeds from (Repayments of) Secured Debt Write Off of Debt Discount Resulting From Early Debt Payment Write Off Debt Discount Resulting From Early Debt Payment Represents the write off deferred debt discount as a result of early debt principal payments. Assets Assets [Abstract] Current Assets: Assets, Current [Abstract] Cash and cash equivalents Restricted cash and bank time deposits Restricted Cash and Cash Equivalents, Current Short-term investments Other Short-term Investments Accounts receivable, net of allowance for doubtful accounts of $1.2 million and $1.1 million, respectively Accounts Receivable, Net, Current Inventories Inventory, Net Deferred cost of revenue Deferred Costs, Current Deferred income taxes Deferred Tax Assets, Net of Valuation Allowance, Current Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Goodwill Capitalized software development costs, net Long-term deferred cost of revenue Deferred Costs, Noncurrent Long-term deferred income taxes Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Other assets Other Assets, Noncurrent Total assets Assets Liabilities and Stockholders' Equity Liabilities and Equity [Abstract] Current Liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued expenses and other current liabilities Accrued Liabilities, Current Current maturities of long-term debt Long-term Debt, Current Maturities Deferred revenue Deferred Revenue, Current Deferred income taxes Deferred Tax Liabilities, Net, Current Total current liabilities Liabilities, Current Long-term debt Long-term Debt, Excluding Current Maturities Long-term deferred revenue Deferred Revenue, Noncurrent Long-term deferred income taxes Deferred Tax Liabilities, Net, Noncurrent Other liabilities Other Liabilities, Noncurrent Total liabilities Liabilities Commitments and Contingencies Commitments and Contingencies Stockholders' Equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Preferred Stock - $0.001 par value; authorized 2,207,000 shares at January 31, 2016 and 2015, respectively; none issued. Temporary Equity, Carrying Amount, Including Portion Attributable to Noncontrolling Interests Common stock - $0.001 par value; authorized 120,000,000 shares. Issued 62,614,000 and 61,253,000 shares; outstanding 62,266,000 and 60,905,000 shares at January 31, 2016 and 2015, respectively. Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Treasury stock, at cost - 348,000 shares at January 31, 2016 and 2015, respectively. Accumulated deficit Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Total Verint Systems Inc. stockholders' equity Stockholders' Equity Attributable to Parent Noncontrolling interest Stockholders' Equity Attributable to Noncontrolling Interest Total stockholders' equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total liabilities and stockholders' equity Liabilities and Equity Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract] Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract] Domestic Income (Loss) from Continuing Operations before Income Taxes, Domestic Foreign Income (Loss) from Continuing Operations before Income Taxes, Foreign Total income before provision (benefit) for income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Variable Interest Entities by Classification of Entity [Axis] Variable Interest Entities [Axis] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] Joint venture, variable interest entity in which entity is primary beneficiary Variable Interest Entity, Primary Beneficiary [Member] Less than Basis of Presentation Variable Interest Entity [Line Items] Equity interest in a joint venture (as a percent) Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage Maximum ownership interest in cost method investments (as a percent) Cost Method Investment Ownership Percentage The percentage of ownership of common stock or equity participation in the investee accounted for under the cost method of accounting. Merger with CTI - Other Disclosures [Abstract] Merger with CTI - Other Disclosures [Abstract] Beneficial ownership position held by parent (as a percent) Noncontrolling Interest, Ownership Percentage by Parent Indemnification Obligations Indemnification Obligations Represents Maximum Indemnification Obligations in Merger Transaction Business Acquisition, Pro Forma Information, Nonrecurring Adjustments [Table] Business Acquisition, Pro Forma Information, Nonrecurring Adjustments [Table] Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] Business Acquisitions, Pro Forma Revenue Business Acquisition, Pro Forma Revenue Business Acquisitions, Pro Forma Net Income Business Acquisition, Pro Forma Net Income (Loss) Business Acquisitions, Pro Forma Net Income Attributable to Verint Systems Inc. Business Combination, Pro Forma Net Income (Loss) Attributable to Verint Systems Inc. Represents the pro forma net income or loss attributable to Verint Systems Inc. for the period as if the business combination or combinations had been completed at the beginning of a period. Business Acquisitions, Pro Forma Earnings Per Share, Basic Business Acquisition, Pro Forma Earnings Per Share, Basic Business Acquisitions, Pro Forma Earnings Per Share, Diluted Business Acquisition, Pro Forma Earnings Per Share, Diluted Income Tax Holiday [Table] Income Tax Holiday [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Income Tax Holiday [Line Items] Income Tax Holiday [Line Items] Exemption Period for Income Taxes Attributable to Approved Enterprise (in years) Exemption Period for Income Taxes Attributable to Approved Enterprise Represents the period of tax exemption for income attributable to an approved enterprise. Period of Reduced Income Tax Rate for Income Attributable to Approved Enterprise (in years) Period of Reduced Income Tax Rate for Income Attributable to Approved Enterprise Represents the period of reduced income tax rate attributable to an approved enterprise. Reduced Income Tax Rate for Income Attributable to Approved Enterprise (as a percent) Reduced Income Tax Rate for Income Attributable to Approved Enterprise Represents the reduced income tax rate for income attributable to an approved enterprise. Effective Income Tax Rate Decrease Due to Tax Incentive (as a percent) Effective Income Tax Rate Decrease Due to Tax Incentive Represents the reduction in effective tax rates resulting from tax incentives. Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract] Effective Income Tax Rate Reconciliation, Amount [Abstract] U.S. federal statutory income tax rate (as a percent) Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Income tax provision at the U.S. federal statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount State income tax (benefit) provision Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Foreign tax rate differential Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Tax incentives Effective Income Tax Rate Reconciliation, Tax Holiday, Amount Valuation allowances Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Stock-based and other compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount Non-deductible expenses Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount Tax credits Effective Income Tax Rate Reconciliation, Tax Credit, Amount Tax contingencies Effective Income Tax Rate Reconciliation, Tax Contingency, Amount Tax effects of reorganizations and liquidations Effective Income Tax Rate Reconciliation, Other Adjustments, Amount U.S. tax effects of foreign operations Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount Other, net Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount Effective income tax rate (as a percent) Effective Income Tax Rate Reconciliation, Percent Deferred Tax Liability Not Recognized Undistributed Foreign Earnings Deferred Tax Liability Not Recognized Undistributed Foreign Earnings The amount as of the balance sheet date of undistributed foreign earnings on which the entity has not provided deferred taxes as these amounts are considered to be indefinitely reinvested. Components of Deferred Tax Assets and Liabilities [Abstract] Components of Deferred Tax Assets and Liabilities [Abstract] Components of Deferred Tax Assets [Abstract] Components of Deferred Tax Assets [Abstract] Accrued expenses Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Other Deferred revenue Deferred Tax Assets, Deferred Income Loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Tax credits Deferred Tax Assets, Tax Credit Carryforwards Stock-based and other compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Capitalized research and development expenses Deferred Tax Assets, Capitalized Research and Development Costs Represents Deferred Tax Assets Resulting from Capitalized Research and Development Costs. Other, net Deferred Tax Assets, Other Total deferred tax assets Deferred Tax Assets, Gross Valuation allowance Deferred Tax Assets, Valuation Allowance Deferred Tax Liabilities, Net Deferred Tax Liabilities, Net Components of Deferred Tax Liabilities [Abstract] Components of Deferred Tax Liabilities [Abstract] Goodwill and other intangible assets Deferred Tax Liabilities, Goodwill and Intangible Assets Unremitted earnings of foreign subsidiaries Deferred Tax Liabilities, Undistributed Foreign Earnings Other, net Deferred Tax Liabilities, Other Total deferred tax liabilities Deferred Tax Liabilities, Gross Deferred Tax Assets (Liabilities), Net [Abstract] Deferred Tax Assets, Net, Classification [Abstract] Current deferred tax assets Long-term deferred tax assets Current deferred tax liabilities Long-term deferred tax liabilities Operating Leases, Rent Expense, Net [Abstract] Rent expenses incurred under all operating leases Operating Leases, Rent Expense, Net Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals Minimum annual sublease Rental income Minimum Annual Sublease Rental Income Total minimum expected future sublease income on an annual basis through March 2018. Maximum annual sublease rental income Maximum Annual Sublease Rental Income Total maximum expected future sublease income on an annual basis through March 2018. Unconditional Purchase Obligations (Excluding Capital Stock Redemptions) [Abstract] Unconditional purchase obligations Unrecorded Unconditional Purchase Obligation Unconditional purchase obligations, subsequent fulfillment period (in months) Recorded Unconditional Purchase Obligation Subsequent Fulfillment Period Represents the subsequent time period in which the unconditional purchase obligations will be fulfilled. Concentration Risks, Types, No Concentration Percentage [Abstract] Outstanding letters of credit and surety bonds Letters of Credit and Surety Bonds Outstanding Amount Represents the outstanding amount as of the balance sheet date for letters of credit and surety bonds. Operating Results by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] Document And Entity Information -- None. No documentation exists for this element. -- Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Current Reporting Status Entity Current Reporting Status Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Public Float Entity Public Float Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Income (loss) before income taxes Income(Loss)BeforeIncomeTaxes [Member] Represents the income statement location of "Income (Loss) before Provision For Income Taxes". Net income (loss) NetIncome(Loss) [Member] Represents the Income Statement location of "Net Income (Loss)" Basic net income (loss) per share attributable to Verint Systems Inc. BasicNetIncome(Loss)PerShare [Member] Represents the Income Statement location of "Basic Net Income (Loss) Per Share" Correction of immaterial error Quantifying Misstatement in Current Year Financial Statements, Amount Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] In Process Research and Development In Process Research and Development [Member] Trade Names Trade Names [Member] Non-competition Agreements Noncompete Agreements [Member] Distribution network Distribution Rights [Member] Acquired Finite-Lived Intangible Assets [Line Items] Acquired Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets, Gross Finite-Lived Intangible Assets, Gross Finite-Lived Intangible Assets, Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Finite-Lived Intangible Assets, Net Indefinite-Lived Intangible Assets (Excluding Goodwill) Indefinite-Lived Intangible Assets (Excluding Goodwill) Finite and Indefinite-Lived Intangible Assets Gross Finite and Indefinite-Lived Intangible Assets Gross Sum of the gross carrying amounts before accumulated amortization as of the balance sheet date of all intangible assets. The aggregate gross carrying amount including any previously recognized impairment charges. Amounts Reclassified From AOCI Into the Statement of Operations [Abstract] Amounts Reclassified From AOCI Into the Statement of Operations [Abstract] Amounts Reclassified From AOCI Into the Statement of Operations [Abstract] Selling, general and administrative Selling, General and Administrative Expenses [Member] Reclassifications Out of Accumulated Other Comprehensive Income (Loss) Reclassifications Out of Accumulated Other Comprehensive Income (Loss) [Line Items] Represents amounts reclassified out of Accumulated Other Comprehensive Income (Loss) into the Statement of Operations. Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net (Benefit) provision for income taxes Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax Amounts reclassified out of accumulated other comprehensive income (loss) Schedule of acquisition-related intangible assets Schedule of Acquired Finite-Lived and Indefinite-Lived Intangible Assets by Major Class [Text Block] Tabular disclosure of the characteristics, including initial carrying value, residual amount, and weighted average useful life, of finite-lived intangible assets acquired during the period and acquired indefinite-lived intangible assets by major class. Schedule of net acquisition-related intangible assets by reportable segment Schedule of Acquired Finite-Lived and Indefinite-Lived Intangible Assets by Segment [Text Block] Tabular disclosure of acquired finite-lived and indefinite-lived intangible assets by segment. Schedule of estimated future amortization expense on finite-lived acquisition-related intangible assets Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Schedule of goodwill activity Schedule of Goodwill [Table Text Block] Gross Profit Income (loss) before (benefit) provision for income taxes Net income (loss) Net (loss) income attributable to Verint Systems Inc. Net (loss) income attributable to Verint Systems Inc. for basic net (loss) income per common share Net (loss) income attributable to Verint Systems Inc. for diluted net (loss) income per common share Net Income (Loss) Available to Common Stockholders, Diluted Foreign Currency Transaction Gain (Loss), before Tax [Abstract] Foreign currency losses, net Foreign Currency Transaction Gain (Loss), before Tax Schedule of Quarterly Financial Information [Table Text Block] Schedule of Quarterly Financial Information [Table Text Block] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation and Significant Accounting Policies [Text Block] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Corporate Joint Venture Corporate Joint Venture [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Related Party Transaction, Expenses from Transactions with Related Party Related Party Transaction, Expenses from Transactions with Related Party Related Party Transaction, Revenues from Transactions with Related Party Revenue from Related Parties Fair value of contingent consideration Business Combination, Consideration Transferred Business Combination, Consideration Transferred Accounts receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Other current assets, including cash acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other Other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Current and other liabilities Business Acquisition, Purchase Price Allocation, Current and Other Noncurrent Liabilities The amount of acquisition cost of a business combination allocated to current liabilities and other noncurrent liabilities of the acquired entity. Deferred Revenue - Current and Long-Term Deferred Income Taxes - Current and Long-Term Deferred Income Taxes - Current and Long-Term Represents the combined amount of current and long-term deferred income taxes. Net Tangible Assets (Liabilities) Net Tangible Assets Acquired The amount of acquisition cost of a business combination allocated to net tangible assets. Identifiable intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Total Purchase Price Allocations Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value by Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Recurring Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Level 3 Fair Value, Inputs, Level 3 [Member] Assets and Liabilities Measured at Fair Value on Recurring Basis Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Assets: Assets, Fair Value Disclosure [Abstract] Money market funds Corporate debt securities, classified as cash and cash equivalents Available-for-sale Securities, Debt Securities, Current Commercial paper, classified as cash and cash equivalents Commercial Paper, at Carrying Value Short-term investments, classified as available-for-sale Foreign currency forward contracts Foreign Currency Contract, Asset, Fair Value Disclosure Total assets Assets, Fair Value Disclosure Liabilities: Liabilities, Fair Value Disclosure [Abstract] Foreign currency forward contracts Foreign Currency Contracts, Liability, Fair Value Disclosure Contingent consideration- business combinations Total liabilities Financial and Nonfinancial Liabilities, Fair Value Disclosure Schedule of assets and liabilities measured at fair value on recurring basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of changes in the estimated fair value of liability for contingent consideration measured using significant unobservable inputs (Level 3) Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Statement of Stockholders' Equity [Abstract] Statement, Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Total Verint Systems Inc. Stockholders' Equity Parent [Member] Common Stock Common Stock [Member] Treasury Stock Treasury Stock [Member] Accumulated Deficit Retained Earnings [Member] Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Noncontrolling Interest Noncontrolling Interest [Member] Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax Common stock issued in public offering, net of issuance costs Stock Issued During Period, Value, New Issues Common stock issued in public offering, net of issuance costs (in shares) Equity component of convertible notes, net of issuance costs Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt Purchase of convertible note hedges Purchase of Convertible Note Hedges Decrease in additional paid in capital (APIC) resulting from the purchase of note hedges to reduce dilution risk related to Convertible Notes. Issuance of warrants Adjustments to Additional Paid in Capital, Warrant Issued Stock-based compensation - equity portion Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Exercises of stock options Stock Issued During Period, Value, Stock Options Exercised Exercises of stock options (in shares) Common stock issued for stock awards and stock bonuses Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Common stock issued for stock awards and stock bonuses (in shares) Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Purchases of treasury stock Treasury Stock, Value, Acquired, Cost Method Purchases of treasury stock (in shares) Treasury Stock, Shares, Acquired Common stock issued for CTI Merger, net Stock Issued During Period, Value, Acquisitions Common stock issued for CTI Merger, net (in shares) Stock Issued During Period, Shares, Acquisitions Dividends to noncontrolling interest Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Tax effects from stock award plans Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net Balances Balances (in shares) Shares, Outstanding Balances Balances (in shares) Statement of Comprehensive Income [Abstract] Other comprehensive income (loss), net of reclassification adjustments: Other Comprehensive Income (Loss), before Tax [Abstract] Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax Net unrealized (losses) gains on available-for-sale securities Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss), Net of Tax Net unrealized gains (losses) on derivative financial instruments designated as hedges Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax (Provision) benefit for income taxes on net unrealized gains (losses) on derivative financial instruments designated as hedges Other Comprehensive Income (Loss), Tax Other comprehensive (loss) income Comprehensive (loss) income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income attributable to noncontrolling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive (loss) income attributable to Verint Systems Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Impairment of Intangible Assets, Finite-lived Impairment of Intangible Assets, Finite-lived Amortization of Intangible Assets Loss Contingency, Information about Litigation Matters [Abstract] Loss Contingency, Damages Sought, Value Loss Contingency, Damages Sought, Value Restricted stock units and restricted stock awards Restricted Stock and Restricted Stock Units RSU [Member] Represents information in the aggregate for restricted stock and restricted units, shares or stock units that an entity has not yet issued because the agreed-upon consideration, such as employee services, has not yet been received. Phantom stock units Phantom Share Units (PSUs) [Member] Other Intangible Assets Other Intangible Assets [Member] Summary of components of accumulated other comprehensive (income) loss Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of amounts reclassified out of AOCI into the statement of operations by presentation location Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Schedule of components of income before provision (benefit) for income taxes Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Schedule of provision (benefit) for income taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Reconciliation of the U.S. federal statutory rate to the entity's effective tax rate on income before income taxes Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of deferred tax assets and liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Schedule of valuation allowance Summary of Valuation Allowance [Table Text Block] Schedule of aggregate changes in the balance of gross unrecognized tax benefits Summary of Income Tax Contingencies [Table Text Block] Schedule of income tax returns under examination in major tax jurisdictions Summary of Income Tax Examinations [Table Text Block] Interest Rate at end of period (as a percent) Accrued expenses and other current liabilities Accrued expenses and other current liabilities [Member] Accrued expenses and other current liabilities [Member] Series of Individually Immaterial Business Acquisitions Jan-2014 Series of Individually Immaterial Business Acquisitions Jan-2014 [Member] Series of Individually Immaterial Business Acquisitions Jan-2014 [Member] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Schedule of Purchase Price Allocations - Acquisitions for the Year Ended January 31, 2016 Schedule of Purchase Price Allocation Jan 2016 [Table Text Block] Schedule of Purchase Price Allocation Jan 2016 [Table Text Block] Schedule of Purchase Price Allocations - Acquisitions for the Year Ended January 31, 2015 Schedule of Purchase Price Allocation Jan 2015 [Table Text Block] [Table Text Block] for Schedule of Purchase Price Allocation Jan 2015 [Table] Business Acquisition, Pro Forma Information Business Acquisition, Pro Forma Information [Table Text Block] Net Tangible Assets (Liabilities) Debt Conversion [Table] Debt Conversion [Table] Debt Conversion Debt Conversion [Line Items] Other debt Notes Payable, Other Payables [Member] Gross term loan borrowings Unamortized debt discounts and issuance costs Unamortized debt discounts and issuance costs Unamortized debt discounts and issuance costs, netted against gross debt Total debt Long-term Debt Long-term debt Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2015 Long-Term Stock Incentive Plan 2015 Long-Term Stock Incentive Plan [Member] 2015 Long-Term Stock Incentive Plan, as approved by shareholders in June 2015. 2015 Plan 2015 Plan [Member] 2015 Plan [Member] Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Reduction in 2015 Plan Capacity - Options and Stock-Settled SARs Reduction in 2015 Plan Capacity - Options and Stock-Settled SARs This is the reduction in award capacity under the 2015 Long-Term Stock Incentive Plan resulting from an option ward or a stock-settled stock appreciation right. Reduction in 2015 Plan Capacity - Other Awards Reduction in 2015 Plan Capacity - Other Awards This is the reduction in award capacity under the 2015 Long-Term Stock Incentive Plan resulting from an award other than a stock option or a stock-settled stock appreciation right. Changes in the balance of gross unrecognized tax benefits Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Gross unrecognized tax benefits, beginning of year Unrecognized Tax Benefits Increases related to tax positions taken during the current year Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Increases as a result of business combinations Unrecognized Tax Benefits, Increases Resulting From Business Acquisitions Represents Increases in Unrecognized Tax Benefits Resulting From Business Acquisitions Increases related to tax positions taken during prior years Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions (Decreases) increases related to foreign currency exchange rate Unrecognized Tax Benefits, Increases (Decreases) Resulting from Foreign Currency Fluctuations Represents the Increase or Decrease in Unrecognized Tax Benefits Resulting from Foreign Currency Rate Fluctuations. Reductions for tax positions of prior years Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Reductions for settlements with tax authorities Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Lapses of statutes of limitation Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Gross unrecognized tax benefits, end of year Unrecognized Tax Benefits that Would Impact Effective Tax Rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit Decrease in Unrecognized Tax Benefits is Reasonably Possible STOCKHOLDERS' EQUITY Stockholders' Equity Note Disclosure [Text Block] Business Acquisition, Goodwill, Expected Tax Deductible Amount Business Acquisition, Goodwill, Expected Tax Deductible Amount Business Acquisition, Purchase Price Allocation, Goodwill, Tax Not Deductible Amount Business Acquisition, Purchase Price Allocation, Goodwill, Tax Not Deductible Amount The amount of goodwill arising from a business combination that is expected not to be deductible for tax purposes. Valuation and Qualifying Accounts [Abstract] Balance at beginning of year Provisions charged to expense Valuation Allowances and Reserves, Charged to Cost and Expense Amounts written off Valuation Allowances and Reserves, Deductions Other, including fluctuations in foreign exchange rates Balance at end of year Schedule of Cash, Cash Equivalents and Short-term Investments [Table Text Block] Cash, Cash Equivalents and Investments [Table Text Block] Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Internal Revenue Service (IRS) Internal Revenue Service (IRS) [Member] State and Local Jurisdictions State and Local Jurisdiction [Member] Foreign Countries Foreign Tax Authority [Member] Operating Loss Carryforwards [Line Items] Operating Loss Carryforwards [Line Items] Operating Loss Carryforwards Operating Loss Carryforwards Operating Loss Carry Forwards Subject to Expiration Operating Loss Carry Forwards Subject to Expiration The amount of net operating loss carryforwards, before tax effects, available to reduce future taxable income under enacted tax laws, subject to expiration. Tax Credit Carryforward Tax Credit Carryforward, Amount Tax Credit Carryforward Amount Indefinite Carryforward Tax Credit Carryforward Amount Indefinite Carryforward The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws that may be carried forward indefinitely. Tax Credit Carryforward Amount Subject to Expiration Tax Credit Carryforward Amount Subject to Expiration The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws, subject to expiration. Merger Agreement with CTI [Axis] Merger with CTI Number of common stock shares issued to CTI shareholders in the Merger (in shares) Common Shares Issued in Merger Transaction Represents the number of shares issued in Merger Transaction. CTI common stock shares issued and outstanding (in shares) Shares of Common Stock Held by Majority Shareholder (in shares) Shares of Common Stock Held by Majority Shareholder Represents Number of Shares of Common Stock Held by Majority Shareholder. Segment, Geographic, and Significant Customer Information [Abstract] Segment, Geographic, and Significant Customer Information [Abstract] Schedule of Revenue by Major Customers, by Reporting Segments [Table] Schedule of Revenue by Major Customers, by Reporting Segments [Table] Revenue, Major Customer Revenue, Major Customer [Line Items] Threshold for Disclosure Percentage Threshold for Disclosure Percentage Threshold percentage which the entity uses for disclosure. Entity-Wide Revenue, Major Customer, Percentage Concentration Risk, Percentage Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Estimate of Fair Value Measurement Estimate of Fair Value Measurement [Member] Term loans Medium-term Notes [Member] Other Financial Instruments Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Long-term debt Long-term Debt, Fair Value Convertible Debt, Fair Value Disclosures Convertible Debt, Fair Value Disclosures Schedule of Future Minimum Rental Payments for Operating Leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Schedule of Warranty Liability Schedule of Product Warranty Liability [Table Text Block] Schedule of calculation of basic and diluted net income per common share attributable to Verint Systems Inc. Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of anti-dilutive securities Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] DERIVATIVE FINANCIAL INSTRUMENTS Derivative Instruments and Hedging Activities Disclosure [Text Block] 2016 Plan 2016 Plan [Member] 2016 Plan [Member] Bonus Share Program Bonus Share Program [Member] Represents awards under the Bonus Share Program Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Product Warranties Disclosures [Abstract] Product Liability Contingency [Table] Product Liability Contingency [Table] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Hardware Hardware [Member] Represents hardware products. Product Liability Contingency Product Liability Contingency [Line Items] Warranty period (in days/years) Product Warranty Period Represents the product warranty period under standard and extended warranty protection rights granted to customers. Movement in Standard Product Warranty Accrual Movement in Standard Product Warranty Accrual [Roll Forward] Warranty liability, beginning of year Standard Product Warranty Accrual Provision charged to (credited against) expenses Standard Product Warranty Accrual, Warranties Issued Warranty charges Standard Product Warranty Accrual, Payments Foreign currency translation and other Standard Product Warranty Accrual, Currency Translation, Increase (Decrease) Warranty liability, end of year Inventories Inventory, Net [Abstract] Raw materials Inventory, Raw Materials, Gross Work-in-process Inventory, Work in Process, Gross Finished goods Inventory, Finished Goods, Gross Total inventories Land and buildings Land and Building [Member] Leasehold Improvements Leasehold Improvements [Member] Property and Equipment, gross Property, Plant and Equipment, Gross Accumulated Depreciation and Amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property and Equipment, net Depreciation [Abstract] Depreciation [Abstract] Depreciation Expense Depreciation Other Assets [Abstract] Other Assets, Noncurrent [Abstract] Deferred debt issuance costs, net Deferred Finance Costs, Noncurrent, Net Long-term restricted cash and time deposits Restricted Cash and Cash Equivalents, Noncurrent Other Other Assets, Miscellaneous, Noncurrent Total other assets Other Assets Accounts Payable and Accrued Liabilities, Current [Abstract] Accounts Payable and Accrued Liabilities, Current [Abstract] Compensation and benefits Compensation and Benefits Trust Billings in excess of costs and estimated earnings on uncompleted contracts Billings in Excess of Cost, Current Income taxes Accrued Income Taxes, Current Professional and consulting fees Accrued Professional Fees, Current Derivative financial instruments - current portion Derivative Instruments and Hedges, Liabilities Distributor and agent commissions Accrued Sales Commission, Current Taxes other than income taxes Accrual for Taxes Other than Income Taxes, Current Interest on indebtedness Interest Payable, Current Contingent consideration - current portion Business Combination, Contingent Consideration, Liability, Current Other Other Accrued Liabilities, Current Total accrued expenses and other current liabilities Other Liabilities [Abstract] Other Liabilities, Noncurrent [Abstract] Unrecognized tax benefits, including interest and penalties Liability for Uncertain Tax Positions, Noncurrent Contingent consideration - long-term portion Business Combination, Contingent Consideration, Liability, Noncurrent Deferred rent expense Deferred Rent Credit, Noncurrent Obligations for severance compensation Supplemental Unemployment Benefits, Severance Benefits Other Other Sundry Liabilities, Noncurrent Total other liabilities Gains on derivative financial instruments, net Derivative, Gain (Loss) on Derivative, Net Derecognition of indemnification asset related to CTI Merger Indemnification asset write off Indemnification asset write off included in other income (expense) Other, net Other Nonoperating Income Expense Miscellaneous The net amount of miscellaneous other income and expense, which has not been itemized or categorized in the footnotes to the financial statements and is a component of other income and expense, net. Total other expense, net Supplemental information regarding consolidated cash flows Supplemental Cash Flow Information [Abstract] Cash paid for interest Interest Paid Cash payments (refunds) of income taxes, net Income Taxes Paid, Net Non-cash investing and financing transactions: Noncash Investing and Financing Items [Abstract] Accrued but unpaid purchases of property and equipment Capital Expenditures Incurred but Not yet Paid Inventory transfers to property and equipment Inventory Transfer to Property and Equipment Value of inventory transferred to property and equipment in noncash transactions. Liabilities for contingent consideration in business combinations Liabilities Assumed Leasehold improvements funded by lease incentive Leasehold Improvements Funded by Lease Incentive Value of leasehold improvements funded by lease incentive in noncash transactions. Noncash net assets acquired in CTI Merger Noncash or Part Noncash Acquisition, Net Nonmonetary Assets Acquired (Liabilities Assumed) Note Hedges - Shares (in shares) Option Indexed to Issuer's Equity, Shares Note Hedges - Strike Price (in dollars per share) Option Indexed to Issuer's Equity, Strike Price Payments for convertible note hedges Warrants (in shares) Class of Warrant or Right, Number of Securities Called by Warrants or Rights Schedule of recognized stock-based compensation expense on the consolidated statements of operations Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Summary of stock-based compensation expense by type of award Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block] Schedule of total stock-based compensation expense by classification Schedule of Employee Service Share-based Compensation Allocation of Recognized Period Costs Balance Sheet Classification [Table Text Block] Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet for the period. Schedule of stock option activity under the Plans Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Summary of key data points for exercised options Schedule of Cash Proceeds Received from Share-based Payment Awards [Table Text Block] Summary of RSA and RSU activity under the Plans Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Summary of key data for Stock Bonus Program Stock Bonus Program Certain Key Data [Table Text Block] [Table Text Block] for Stock Bonus Program Certain Key Data [Table] Performance based RSU's Performance Shares [Member] RSUs Restricted Stock Units (RSUs) [Member] Summary of award activity Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Released (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Ending balance (in shares) Weighted-Average Grant-Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award Equity Instruments Other than Options Weighted Average Grant Date Fair Value [Abstract] Beginning balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Released (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Ending balance (in dollars per share) Additional disclosures Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract] Restricted stock units expected to vest Share-based Compensation Arrangement by Share-based Payment Award, Other Than Options Options, Vested and Expected to Vest, Outstanding, Number As of the balance sheet date, the number of shares into which fully vested and expected to vest awards other than stock options can be converted. Unrecognized compensation expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Remaining weighted-average vesting period over which expense is expected to be recognized (in years) Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Total fair value of units vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Credit Agreement Credit Agreement [Member] Represents the new credit agreement which consists of a seven-year term loan facility and a six-year revolving line of credit. Interest Expense at Coupon or Contractual Rate Interest Expense, Debt, Excluding Amortization Amortization of Debt Discount Amortization of Debt Discount (Premium) Amortization of Deferred Debt Issuance Costs Amortization of Financing Costs Total Interest Expense Interest Expense, Debt