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LEASE COMMITMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 2419405 - Disclosure - COMMITMENTS AND CONTINGENCIES COMMITMENTS AND CONTINGENCIES - LITIGATION (Details) link:presentationLink link:calculationLink link:definitionLink 2319301 - Disclosure - COMMITMENTS AND CONTINGENCIES COMMITMENTS AND CONTINGENCIES (Tables) link:presentationLink link:calculationLink link:definitionLink 2419404 - Disclosure - COMMITMENTS AND CONTINGENCIES COMMITMENTS AND CONTINGENCIES - WARRANTY OBLIGATIONS (Details) link:presentationLink link:calculationLink link:definitionLink 2419402 - Disclosure - COMMITMENTS AND CONTINGENCIES - RENT EXPENSE; PURCHASE OBLIGATIONS (Details) link:presentationLink link:calculationLink link:definitionLink 1001000 - Statement - Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 1001501 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 1006000 - 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Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS - GAINS AND LOSSES (Details) link:presentationLink link:calculationLink link:definitionLink 2315301 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 0001000 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 2114100 - Disclosure - FAIR VALUE MEASUREMENTS link:presentationLink link:calculationLink link:definitionLink 2414403 - Disclosure - FAIR VALUE MEASUREMENTS - CONTINGENT CONSIDERATION TABLE (Details) link:presentationLink link:calculationLink link:definitionLink 2414402 - Disclosure - FAIR VALUE MEASUREMENTS - FAIR VALUE TABLE (Details) link:presentationLink link:calculationLink link:definitionLink 2414404 - Disclosure - FAIR VALUE MEASUREMENTS - OTHER FAIR VALUE DISCLOSURES (Details) link:presentationLink link:calculationLink link:definitionLink 2314301 - Disclosure - FAIR VALUE MEASUREMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 2113100 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 2413406 - Disclosure - INCOME TAXES INCOME TAXES - CARRYFORWARDS (Details) link:presentationLink link:calculationLink link:definitionLink 2413405 - Disclosure - INCOME TAXES INCOME TAXES - DEFERRED INCOME TAXES (Details) link:presentationLink link:calculationLink link:definitionLink 2413404 - Disclosure - INCOME TAXES INCOME TAXES - EFFECTIVE TAX RATE RECONCILIATION (Details) link:presentationLink link:calculationLink link:definitionLink 2413402 - Disclosure - INCOME TAXES INCOME TAXES - INCOME BEFORE TAXES (Details) link:presentationLink link:calculationLink link:definitionLink 2413403 - Disclosure - INCOME TAXES INCOME TAXES - PROVISION FOR INCOME TAXES (Details) link:presentationLink link:calculationLink link:definitionLink 2313301 - Disclosure - INCOME TAXES INCOME TAXES (Tables) link:presentationLink link:calculationLink link:definitionLink 2413408 - Disclosure - INCOME TAXES INCOME TAXES - UNRECOGNIZED TAX BENEFITS (Details) link:presentationLink link:calculationLink link:definitionLink 2413407 - Disclosure - INCOME TAXES INCOME TAXES - VALUATION ALLOWANCES (Details) link:presentationLink link:calculationLink link:definitionLink 2107100 - Disclosure - INTANGIBLE ASSETS AND GOODWILL link:presentationLink link:calculationLink link:definitionLink 2407404 - Disclosure - INTANGIBLE ASSETS AND GOODWILL - GOODWILL (Details) link:presentationLink link:calculationLink link:definitionLink 2407403 - Disclosure - INTANGIBLE ASSETS AND GOODWILL INTANGIBLE ASSETS AND GOODWILL - FUTURE AMORTIZATION OF INTANGIBLE ASSETS (Details) link:presentationLink link:calculationLink link:definitionLink 2407402 - Disclosure - INTANGIBLE ASSETS AND GOODWILL - INTANGIBLE ASSETS (Details) link:presentationLink link:calculationLink link:definitionLink 2307301 - Disclosure - INTANGIBLE ASSETS AND GOODWILL (Tables) link:presentationLink link:calculationLink link:definitionLink 2108100 - Disclosure - LONG-TERM DEBT link:presentationLink link:calculationLink link:definitionLink 2408403 - Disclosure - LONG-TERM DEBT LONG-TERM DEBT - CREDIT AGREEMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 2408405 - Disclosure - LONG-TERM DEBT LONG-TERM DEBT - FEES (Details) link:presentationLink link:calculationLink link:definitionLink 2408406 - Disclosure - LONG-TERM DEBT LONG-TERM DEBT - FUTURE AMORTIZATION (Details) link:presentationLink link:calculationLink link:definitionLink 2408407 - Disclosure - LONG-TERM DEBT LONG-TERM DEBT - INTEREST EXPENSE (Details) link:presentationLink link:calculationLink link:definitionLink 2408404 - Disclosure - LONG-TERM DEBT LONG-TERM DEBT - INTEREST RATE DETAILS (Details) link:presentationLink link:calculationLink link:definitionLink 2408408 - Disclosure - LONG-TERM DEBT LONG-TERM DEBT - OTHER DEBT (Details) link:presentationLink link:calculationLink link:definitionLink 2408402 - Disclosure - LONG-TERM DEBT LONG-TERM DEBT - SUMMARY (Details) link:presentationLink link:calculationLink link:definitionLink 2308301 - Disclosure - LONG-TERM DEBT (Tables) link:presentationLink link:calculationLink link:definitionLink 2105100 - Disclosure - MERGER WITH CTI link:presentationLink link:calculationLink link:definitionLink 2405402 - Disclosure - MERGER WITH CTI MERGER WITH CTI - CONSOLIDATED FINANCIAL STATEMENT IMPACT (Details) link:presentationLink link:calculationLink link:definitionLink 2405401 - Disclosure - MERGER WITH CTI MERGER WITH CTI - EXCHANGE OF SHARES (Details) link:presentationLink link:calculationLink link:definitionLink 2405403 - Disclosure - MERGER WITH CTI MERGER WITH CTI - OTHER DISCLOSURES (Details) link:presentationLink link:calculationLink link:definitionLink 2102100 - Disclosure - NET INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. link:presentationLink link:calculationLink link:definitionLink 2402403 - Disclosure - NET INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. NET INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. - ANTIDILUTIVE SECURITIES (Details) link:presentationLink link:calculationLink link:definitionLink 2402402 - Disclosure - NET INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. NET INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. - CALCULATION (Details) link:presentationLink link:calculationLink link:definitionLink 2302301 - Disclosure - NET INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. (Tables) link:presentationLink link:calculationLink link:definitionLink 2118100 - Disclosure - RELATED PARTY TRANSACTIONS link:presentationLink link:calculationLink link:definitionLink 2418401 - Disclosure - RELATED PARTY TRANSACTIONS (Details) link:presentationLink link:calculationLink link:definitionLink 2112100 - Disclosure - RESEARCH AND DEVELOPMENT, NET link:presentationLink link:calculationLink link:definitionLink 2412403 - Disclosure - RESEARCH AND DEVELOPMENT, NET RESEARCH AND DEVELOPMENT, NET - CAPITALIZED SOFTWARE DEVELOPMENT COSTS (Details) link:presentationLink link:calculationLink link:definitionLink 2412402 - Disclosure - RESEARCH AND DEVELOPMENT, NET RESEARCH AND DEVELOPMENT, NET - R&D EXPENSES AND GRANTS (Details) link:presentationLink link:calculationLink link:definitionLink 2312301 - Disclosure - RESEARCH AND DEVELOPMENT, NET RESEARCH AND DEVELOPMENT, NET (Tables) link:presentationLink link:calculationLink link:definitionLink 2120100 - Disclosure - SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION link:presentationLink link:calculationLink link:definitionLink 2420404 - Disclosure - SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION - LONG-LIVED ASSETS (Details) link:presentationLink link:calculationLink link:definitionLink 2420405 - Disclosure - SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION - MAJOR CUSTOMERS (Details) link:presentationLink link:calculationLink link:definitionLink 2420403 - Disclosure - SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION - REVENUE BY GEOGRAPHY (Details) link:presentationLink link:calculationLink link:definitionLink 2420402 - Disclosure - SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION - SEGMENT OPERATING RESULTS (Details) link:presentationLink link:calculationLink link:definitionLink 2320301 - Disclosure - SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION (Tables) link:presentationLink link:calculationLink link:definitionLink 2122100 - Disclosure - SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) link:presentationLink link:calculationLink link:definitionLink 2422403 - Disclosure - SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) - EXPLANATORY INFORMATION (Details) link:presentationLink link:calculationLink link:definitionLink 2422402 - Disclosure - SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) - QUARTERLY DATA (Details) link:presentationLink link:calculationLink link:definitionLink 2322301 - Disclosure - SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Tables) link:presentationLink link:calculationLink link:definitionLink 2117100 - Disclosure - STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS link:presentationLink link:calculationLink link:definitionLink 2417412 - Disclosure - STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - ESPP (Details) link:presentationLink link:calculationLink link:definitionLink 2417413 - Disclosure - STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - OTHER BENEFIT PLANS (Details) link:presentationLink link:calculationLink link:definitionLink 2417410 - Disclosure - STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - PHANTOM STOCK (Details) link:presentationLink link:calculationLink link:definitionLink 2417402 - Disclosure - STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - PLAN DETAILS (Details) link:presentationLink link:calculationLink link:definitionLink 2417409 - Disclosure - STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - RESTRICTED STOCK UNITS (Details) link:presentationLink link:calculationLink link:definitionLink 2417403 - Disclosure - STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - STOCK-BASED COMPENSATION - BY LINE ITEM (Details) link:presentationLink link:calculationLink link:definitionLink 2417404 - Disclosure - STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - STOCK-BASED COMPENSATION - BY TYPE (Details) link:presentationLink link:calculationLink link:definitionLink 2417411 - Disclosure - STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - STOCK BONUS PROGRAM (Details) link:presentationLink link:calculationLink link:definitionLink 2417406 - Disclosure - STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - STOCK OPTIONS (Details) link:presentationLink link:calculationLink link:definitionLink 2417407 - Disclosure - STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - STOCK OPTIONS EXERCISE PRICE RANGES (Details) link:presentationLink link:calculationLink link:definitionLink 2417408 - Disclosure - STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - STOCK OPTIONS SUPPLEMENTAIL DISCLOSURES (Details) link:presentationLink link:calculationLink link:definitionLink 2417405 - Disclosure - STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - STOCK-BASED COMPENSATION - BY CLASSIFICATION (Details) link:presentationLink link:calculationLink link:definitionLink 2317301 - Disclosure - STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS (Tables) link:presentationLink link:calculationLink link:definitionLink 2111100 - Disclosure - STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 2411404 - Disclosure - STOCKHOLDERS' EQUITY STOCKHOLDERS' EQUITY - AMOUNTS RECLASSIFIED OUT OF ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) link:presentationLink link:calculationLink link:definitionLink 2411403 - Disclosure - STOCKHOLDERS' EQUITY STOCKHOLDERS' EQUITY - SCHEDULE OF ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) link:presentationLink link:calculationLink link:definitionLink 2311301 - Disclosure - STOCKHOLDERS' EQUITY (Tables) link:presentationLink link:calculationLink link:definitionLink 2411402 - Disclosure - STOCKHOLDERS' EQUITY - TREASURY STOCK/NONCONTROLLING INTEREST (Details) link:presentationLink link:calculationLink link:definitionLink 2121100 - Disclosure - SUBSEQUENT EVENTS link:presentationLink link:calculationLink link:definitionLink 2421401 - Disclosure - SUBSEQUENT EVENTS SUBSEQUENT EVENTS - BUSINESS COMBINATIONS - KANA AND UNION (Details) link:presentationLink link:calculationLink link:definitionLink 2421402 - Disclosure - SUBSEQUENT EVENTS SUBSEQUENT EVENTS - LONG-TERM DEBT (Details) link:presentationLink link:calculationLink link:definitionLink 2421404 - Disclosure - SUBSEQUENT EVENTS SUBSEQUENT EVENTS - LONG-TERM DEBT - FEES (Details) link:presentationLink link:calculationLink link:definitionLink 2421403 - Disclosure - SUBSEQUENT EVENTS SUBSEQUENT EVENTS - LONG-TERM DEBT - INTEREST RATE (Details) link:presentationLink link:calculationLink link:definitionLink 2421405 - Disclosure - SUBSEQUENT EVENTS SUBSEQUENT EVENTS - LONG-TERM DEBT - REPAYMENT (Details) link:presentationLink link:calculationLink link:definitionLink 2421406 - Disclosure - SUBSEQUENT EVENTS SUBSEQUENT EVENTS - STOCK BONUS PROGRAM (Details) link:presentationLink link:calculationLink link:definitionLink 2101100 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 2401403 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - CONSOLIDATION (Details) link:presentationLink link:calculationLink link:definitionLink 2201201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 2401406 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - ALLOWANCE FOR DOUBTFUL ACCOUNTS (Details) link:presentationLink link:calculationLink link:definitionLink 2401404 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - CASH, CASH EQUIVALENTS, AND INVESTMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 2401410 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - COST OF REVENUE; CAPITALIZED SOFTWARE DEVELOPMENT (Details) link:presentationLink link:calculationLink link:definitionLink 2401405 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - COSTS IN EXCESS OF BILLINGS ON LONG-TERM CONTRACTS (Details) link:presentationLink link:calculationLink link:definitionLink 2401411 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - FOREIGN CURRENCY GAINS AND LOSSES (Details) link:presentationLink link:calculationLink link:definitionLink 2401409 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - REVENUE RECOGNITION (Details) link:presentationLink link:calculationLink link:definitionLink 2401408 - 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