2119100 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 2419401 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details) link:presentationLink link:calculationLink link:definitionLink 2129100 - Disclosure - CONDENSED CONSOLIDATING FINANCIAL STATEMENTS link:presentationLink link:calculationLink link:definitionLink 2429403 - Disclosure - CONDENSED CONSOLIDATING FINANCIAL STATEMENTS (Balance Sheets) (Details) link:presentationLink link:calculationLink link:definitionLink 2429404 - Disclosure - CONDENSED CONSOLIDATING FINANCIAL STATEMENTS (Cash Flows) (Details) link:presentationLink link:calculationLink link:definitionLink 2429402 - Disclosure - CONDENSED CONSOLIDATING FINANCIAL STATEMENTS (Operations) (Details) link:presentationLink link:calculationLink link:definitionLink 2429402 - Disclosure - CONDENSED CONSOLIDATING FINANCIAL STATEMENTS (Operations) (Details) link:presentationLink link:calculationLink link:definitionLink 2329301 - Disclosure - CONDENSED CONSOLIDATING FINANCIAL STATEMENTS (Tables) 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 1003000 - Statement - CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 1003501 - Statement - CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 1002000 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 1001000 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS link:presentationLink link:calculationLink link:definitionLink 1001501 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 0001000 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 2110100 - Disclosure - GOODWILL AND INTANGIBLE ASSETS link:presentationLink link:calculationLink link:definitionLink 2410404 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Intangible Assets Acquired) (Details) link:presentationLink link:calculationLink link:definitionLink 2410405 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2410402 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Schedule of Goodwill) (Details) link:presentationLink link:calculationLink link:definitionLink 2410403 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Schedule of Intangible Assets) (Details) link:presentationLink link:calculationLink link:definitionLink 2310301 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Tables) link:presentationLink link:calculationLink link:definitionLink 2117100 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 2417401 - Disclosure - INCOME TAXES (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2120100 - Disclosure - LEASES link:presentationLink link:calculationLink link:definitionLink 2420404 - Disclosure - LEASES (Aggregate Operating Lease Maturities) (Details) link:presentationLink link:calculationLink link:definitionLink 2420404 - Disclosure - LEASES (Aggregate Operating Lease Maturities) (Details) link:presentationLink link:calculationLink link:definitionLink 2420402 - Disclosure - LEASES (Lease Costs) (Details) link:presentationLink link:calculationLink link:definitionLink 2420403 - Disclosure - LEASES (Other Information Related to Operating Leases) (Details) link:presentationLink link:calculationLink link:definitionLink 2320301 - Disclosure - LEASES (Tables) link:presentationLink link:calculationLink link:definitionLink 2128100 - Disclosure - LITIGATION AND OTHER RELATED CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 2428401 - Disclosure - LITIGATION AND OTHER RELATED CONTINGENCIES (Details) link:presentationLink link:calculationLink link:definitionLink 2115100 - Disclosure - LONG-TERM DEBT link:presentationLink link:calculationLink link:definitionLink 2415402 - Disclosure - LONG-TERM DEBT (Components of Long-Term Debt) (Details) link:presentationLink link:calculationLink link:definitionLink 2415402 - Disclosure - LONG-TERM DEBT (Components of Long-Term Debt) (Details) link:presentationLink link:calculationLink link:definitionLink 2315301 - Disclosure - LONG-TERM DEBT LONG-TERM DEBT (Tables) link:presentationLink link:calculationLink link:definitionLink 2415403 - Disclosure - LONG-TERM DEBT (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2103100 - Disclosure - LOSS PER SHARE AND STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 2403403 - Disclosure - LOSS PER SHARE AND STOCKHOLDERS' EQUITY (Computations of Basic and Diluted Earnings Per Share) (Details) link:presentationLink link:calculationLink link:definitionLink 2403402 - Disclosure - LOSS PER SHARE AND STOCKHOLDERS' EQUITY (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2303301 - Disclosure - LOSS PER SHARE AND STOCKHOLDERS' EQUITY (Tables) link:presentationLink link:calculationLink link:definitionLink 2118100 - Disclosure - OTHER INCOME AND OTHER EXPENSES link:presentationLink link:calculationLink link:definitionLink 2418402 - Disclosure - OTHER INCOME AND OTHER EXPENSES (Schedule of Interest Income and Expense of Continuing Operations) (Details) link:presentationLink link:calculationLink link:definitionLink 2318301 - Disclosure - OTHER INCOME AND OTHER EXPENSES (Tables) link:presentationLink link:calculationLink link:definitionLink 2104100 - Disclosure - RECEIVABLES link:presentationLink link:calculationLink link:definitionLink 2404403 - Disclosure - RECEIVABLES (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2404405 - Disclosure - RECEIVABLES (Schedule of Activity in the Allowance For Doubtful Accounts) (Details) link:presentationLink link:calculationLink link:definitionLink 2404404 - Disclosure - RECEIVABLES (Schedule of Receivables Based on Year of Origination) (Details) link:presentationLink link:calculationLink link:definitionLink 2404402 - Disclosure - RECEIVABLES (Schedule of Short-Term Receivables) (Details) link:presentationLink link:calculationLink link:definitionLink 2304301 - Disclosure - RECEIVABLES (Tables) link:presentationLink link:calculationLink link:definitionLink 2102100 - Disclosure - REVENUE RECOGNITION link:presentationLink link:calculationLink link:definitionLink 2402403 - Disclosure - REVENUE RECOGNITION (Deferred Revenue) (Details) link:presentationLink link:calculationLink link:definitionLink 2402402 - Disclosure - REVENUE RECOGNITION (Disaggregation of Revenue by Major Service Line) (Details) link:presentationLink link:calculationLink link:definitionLink 2402404 - Disclosure - REVENUE RECOGNITION (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2402405 - Disclosure - REVENUE RECOGNITION (Remaining Performance Obligation) (Details) link:presentationLink link:calculationLink link:definitionLink 2302301 - Disclosure - REVENUE RECOGNITION (Tables) 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 (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2201201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policy) link:presentationLink link:calculationLink link:definitionLink 2401404 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Schedule of Assets Acquired, Net of Liabilities Assumed) (Details) link:presentationLink link:calculationLink link:definitionLink 2301302 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) link:presentationLink link:calculationLink link:definitionLink