0000001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 0000002 - Statement - CONSOLIDATED BALANCE SHEETS (Unaudited) link:presentationLink link:calculationLink link:definitionLink 0000003 - Statement - CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 0000004 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (Unaudited) link:presentationLink link:calculationLink link:definitionLink 0000005 - Statement - CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) link:presentationLink link:calculationLink link:definitionLink 0000006 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) link:presentationLink link:calculationLink link:definitionLink 0000007 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 0000008 - Disclosure - ORGANIZATION link:presentationLink link:calculationLink link:definitionLink 0000009 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 0000010 - Disclosure - REVENUE link:presentationLink link:calculationLink link:definitionLink 0000011 - Disclosure - CASH AND RESTRICTED CASH link:presentationLink link:calculationLink link:definitionLink 0000012 - Disclosure - ALLOWANCE FOR DOUBTFUL ACCOUNTS link:presentationLink link:calculationLink link:definitionLink 0000013 - Disclosure - GOODWILL AND INTANGIBLE ASSETS link:presentationLink link:calculationLink link:definitionLink 0000014 - Disclosure - EQUITY INVESTMENTS link:presentationLink link:calculationLink link:definitionLink 0000015 - Disclosure - ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES link:presentationLink link:calculationLink link:definitionLink 0000016 - Disclosure - SHAREHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 0000017 - Disclosure - STOCK-BASED COMPENSATION link:presentationLink link:calculationLink link:definitionLink 0000018 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 0000019 - Disclosure - DEBT link:presentationLink link:calculationLink link:definitionLink 0000020 - Disclosure - CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 0000021 - Disclosure - FAIR VALUE MEASUREMENTS link:presentationLink link:calculationLink link:definitionLink 0000022 - Disclosure - SEGMENT INFORMATION link:presentationLink link:calculationLink link:definitionLink 0000023 - Disclosure - RESTRUCTURING ACTIVITIES link:presentationLink link:calculationLink link:definitionLink 0000024 - Disclosure - SUBSEQUENT EVENTS link:presentationLink link:calculationLink link:definitionLink 9954471 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 9954472 - Disclosure - REVENUE (Tables) link:presentationLink link:calculationLink link:definitionLink 9954473 - Disclosure - CASH AND RESTRICTED CASH (Tables) link:presentationLink link:calculationLink link:definitionLink 9954474 - Disclosure - ALLOWANCE FOR DOUBTFUL ACCOUNTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9954475 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Tables) link:presentationLink link:calculationLink link:definitionLink 9954476 - Disclosure - ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9954477 - Disclosure - SHAREHOLDERS' EQUITY (Tables) link:presentationLink link:calculationLink link:definitionLink 9954478 - Disclosure - STOCK-BASED COMPENSATION (Tables) link:presentationLink link:calculationLink link:definitionLink 9954479 - Disclosure - INCOME TAXES (Tables) link:presentationLink link:calculationLink link:definitionLink 9954480 - Disclosure - DEBT (Table) link:presentationLink link:calculationLink link:definitionLink 9954481 - Disclosure - SEGMENT INFORMATION (Tables) link:presentationLink link:calculationLink link:definitionLink 9954482 - Disclosure - RESTRUCTURING ACTIVITIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9954483 - Disclosure - REVENUE - Disaggregation of Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9954484 - Disclosure - REVENUE - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954485 - Disclosure - CASH AND RESTRICTED CASH (Details) link:presentationLink link:calculationLink link:definitionLink 9954486 - Disclosure - ALLOWANCE FOR DOUBTFUL ACCOUNTS (Details) link:presentationLink link:calculationLink link:definitionLink 9954487 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Schedule of Balance of Goodwill, Net and Intangible Assets, Net (Details ) link:presentationLink link:calculationLink link:definitionLink 9954488 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954489 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Schedule of Intangible Assets with Definite Lives (Details) link:presentationLink link:calculationLink link:definitionLink 9954490 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Schedule of Amortization of Intangible Assets with Definite Lives (Details) link:presentationLink link:calculationLink link:definitionLink 9954491 - Disclosure - EQUITY INVESTMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 9954492 - Disclosure - ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Details) link:presentationLink link:calculationLink link:definitionLink 9954493 - Disclosure - SHAREHOLDERS' EQUITY (Details) link:presentationLink link:calculationLink link:definitionLink 9954494 - Disclosure - STOCK-BASED COMPENSATION - Schedule of Non-cash Compensation Related to Equity Awards (Details ) link:presentationLink link:calculationLink link:definitionLink 9954495 - Disclosure - STOCK-BASED COMPENSATION - Summary of Stock Options and Stock Options with Market Conditions (Details) link:presentationLink link:calculationLink link:definitionLink 9954496 - Disclosure - STOCK-BASED COMPENSATION - Summary of RSA & RSU (Details) link:presentationLink link:calculationLink link:definitionLink 9954497 - Disclosure - STOCK-BASED COMPENSATION - Summary of RSUs with Market Conditions Valuation Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 9954498 - Disclosure - STOCK-BASED COMPENSATION - Employee Stock Purchase Plan (Details) link:presentationLink link:calculationLink link:definitionLink 9954499 - Disclosure - INCOME TAXES - Summary of Income Tax Expense and Effective Tax Rate (Details) link:presentationLink link:calculationLink link:definitionLink 9954500 - Disclosure - INCOME TAXES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954501 - Disclosure - DEBT - Convertible Senior Notes Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954502 - Disclosure - DEBT - Components of Notes (Details) link:presentationLink link:calculationLink link:definitionLink 9954503 - Disclosure - DEBT - Convertible Note Hedge and Warrant Transactions (Details) link:presentationLink link:calculationLink link:definitionLink 9954504 - Disclosure - DEBT - 2021 Credit Facility (Details) link:presentationLink link:calculationLink link:definitionLink 9954505 - Disclosure - DEBT - 2024 Term Loan (Details) link:presentationLink link:calculationLink link:definitionLink 9954506 - Disclosure - DEBT - Summary of Current and Long-Term Portion of Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9954507 - Disclosure - CONTINGENCIES (Details) link:presentationLink link:calculationLink link:definitionLink 9954508 - Disclosure - SEGMENT INFORMATION (Details) link:presentationLink link:calculationLink link:definitionLink 9954509 - Disclosure - RESTRUCTURING ACTIVITIES (Details) link:presentationLink link:calculationLink link:definitionLink 9954510 - Disclosure - SUBSEQUENT EVENTS (Details) link:presentationLink link:calculationLink link:definitionLink