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Condensed Consolidated Statements of Cash Flows link:calculationLink link:presentationLink link:definitionLink 1010 - Statement - Condensed Consolidated Statements of Cash Flows (Parenthetical) link:calculationLink link:presentationLink link:definitionLink 1011 - Disclosure - Organization and Significant Accounting Policies link:calculationLink link:presentationLink link:definitionLink 1012 - Disclosure - ACQUISITIONS link:calculationLink link:presentationLink link:definitionLink 1013 - Disclosure - PREPAID EXPENSES AND OTHER CURRENT ASSETS link:calculationLink link:presentationLink link:definitionLink 1014 - Disclosure - FIXED ASSETS link:calculationLink link:presentationLink link:definitionLink 1015 - Disclosure - GOODWILL AND INTANGIBLE ASSETS link:calculationLink link:presentationLink link:definitionLink 1016 - Disclosure - ACCOUNTS PAYABLE AND ACCRUED EXPENSES link:calculationLink link:presentationLink link:definitionLink 1017 - Disclosure - OTHER CURRENT LIABILITIES link:calculationLink link:presentationLink link:definitionLink 1018 - 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Disclosure - INCOME TAXES (Tables) link:calculationLink link:presentationLink link:definitionLink 1046 - Disclosure - STOCKHOLDERS' EQUITY AND STOCK-BASED COMPENSATION (Tables) link:calculationLink link:presentationLink link:definitionLink 1047 - Disclosure - EARNINGS (LOSS) PER SHARE (Tables) link:calculationLink link:presentationLink link:definitionLink 1048 - Disclosure - COMMITMENTS AND CONTINGENCIES (Tables) link:calculationLink link:presentationLink link:definitionLink 1049 - Disclosure - SEGMENT AND GEOGRAPHIC INFORMATION (Tables) link:calculationLink link:presentationLink link:definitionLink 1050 - Disclosure - QUARTERLY RESULTS (UNAUDITED) (Tables) link:calculationLink link:presentationLink link:definitionLink 1051 - Disclosure - Organization and Significant Accounting Policies - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1052 - Disclosure - Carrying and Fair Value of Long-Term Debt (Detail) link:calculationLink link:presentationLink link:definitionLink 1053 - Disclosure - Activity in Allowance for Doubtful Accounts (Detail) link:calculationLink link:presentationLink link:definitionLink 1054 - Disclosure - Acquisitions - 2010 Acquisitions - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1055 - Disclosure - Fair Value of Assets Acquired (Detail) link:calculationLink link:presentationLink link:definitionLink 1056 - Disclosure - Acquisitions - 2011 Acquisitions - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1057 - Disclosure - Acquisitions - Summary of Operating Results (Detail) link:calculationLink link:presentationLink link:definitionLink 1058 - Disclosure - Acquisitions - 2012 Acquisitions - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1059 - Disclosure - Acquisitions - Allocation of Purchase Price (Detail) link:calculationLink link:presentationLink link:definitionLink 1060 - Disclosure - Schedule of Prepaid Expenses and Other Current Assets (Detail) link:calculationLink link:presentationLink link:definitionLink 1061 - Disclosure - Summary of Fixed Assets (Detail) link:calculationLink link:presentationLink link:definitionLink 1062 - Disclosure - Fixed Assets - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1063 - Disclosure - Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) link:calculationLink link:presentationLink link:definitionLink 1064 - Disclosure - Goodwill and Intangible Assets - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1065 - Disclosure - Goodwill and Intangible Assets - Intangible Assets Subject to Amortization (Detail) link:calculationLink link:presentationLink link:definitionLink 1066 - Disclosure - Goodwill and Intangible Assets - Estimated Amortization Expense Related to Intangible Assets (Detail) link:calculationLink link:presentationLink link:definitionLink 1067 - Disclosure - Accounts Payable and Accrued Expenses (Detail) link:calculationLink link:presentationLink link:definitionLink 1068 - Disclosure - Other Current Liabilities (Detail) link:calculationLink link:presentationLink link:definitionLink 1069 - Disclosure - Summary of Other Long-Term Liabilities (Detail) link:calculationLink link:presentationLink link:definitionLink 1070 - Disclosure - Borrowing Arrangements - Outstanding Borrowing (Detail) link:calculationLink link:presentationLink link:definitionLink 1071 - Disclosure - Credit Arrangements and Debt Obligations - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1072 - Disclosure - Redeemable Noncontrolling Interest - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1073 - Disclosure - Changes in Redeemable Noncontrolling Interest (Detail) link:calculationLink link:presentationLink link:definitionLink 1074 - Disclosure - Changes in Redeemable Noncontrolling Interest (Parenthetical) (Detail) link:calculationLink link:presentationLink link:definitionLink 1075 - Disclosure - (Loss) Income Before Income Taxes (Detail) link:calculationLink link:presentationLink link:definitionLink 1076 - Disclosure - Income Tax (Benefit) Expense (Detail) link:calculationLink link:presentationLink link:definitionLink 1077 - Disclosure - Reconciliation of Federal to Effective Rate (Detail) link:calculationLink link:presentationLink link:definitionLink 1078 - Disclosure - Components of Net Deferred Tax Liability (Detail) link:calculationLink link:presentationLink link:definitionLink 1079 - Disclosure - Income Taxes - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1080 - Disclosure - Reconciliation of Unrecognized Tax Benefits (Detail) link:calculationLink link:presentationLink link:definitionLink 1081 - Disclosure - Stockholder's Equity and Stock-Based Compensation - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1082 - Disclosure - Reconciliation of Changes In Class L Common Stock (Detail) link:calculationLink link:presentationLink link:definitionLink 1083 - Disclosure - Stock Option Activity For Continuation Options (Detail) link:calculationLink link:presentationLink link:definitionLink 1084 - Disclosure - Fair Value Of Stock Options (Detail) link:calculationLink link:presentationLink link:definitionLink 1085 - Disclosure - Stock Option Activity Under Equity Plan (Detail) link:calculationLink link:presentationLink link:definitionLink 1086 - Disclosure - Earnings (Loss) Per Share - Computation of Basic and Diluted Earnings Per Common Share (Detail) link:calculationLink link:presentationLink link:definitionLink 1087 - Disclosure - Earnings (Loss) Per Share - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1088 - Disclosure - Commitments and Contingencies - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1089 - Disclosure - Future Minimum Payments Under Non-Cancelable Operating Leases (Detail) link:calculationLink link:presentationLink link:definitionLink 1090 - Disclosure - Future Minimum Payments of Long-term Debt (Detail) link:calculationLink link:presentationLink link:definitionLink 1091 - Disclosure - Employee Benefit Plans (Detail) link:calculationLink link:presentationLink link:definitionLink 1092 - Disclosure - Segment And Geographic Information - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1093 - Disclosure - Segment Information - Income from Operations by Segment (Detail) link:calculationLink link:presentationLink link:definitionLink 1094 - Disclosure - Revenue By Geographic Region (Detail) link:calculationLink link:presentationLink link:definitionLink 1095 - Disclosure - Long-lived Assets By Geographic Region (Detail) link:calculationLink link:presentationLink link:definitionLink 1096 - Disclosure - Transactions with Related Parties - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1097 - Disclosure - Quarterly Results (Detail) link:calculationLink link:presentationLink link:definitionLink 1098 - Disclosure - Acquisitions - 2013 Acquisition - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1099 - Disclosure - Acquisition - Allocation of Purchased Assets and Liabilities (Detail) link:calculationLink link:presentationLink link:definitionLink 1100 - Disclosure - Borrowing Arrangements - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1101 - Disclosure - Borrowing Arrangements - Future Principal Payments Under New Term Loan (Detail) link:calculationLink link:presentationLink link:definitionLink 1102 - Disclosure - Stockholders' Equity - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1103 - Disclosure - Stock-Based Compensation - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1104 - Disclosure - Fair Value Measures - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1105 - Disclosure - Segment Information - Income from Operations by Segment (Parenthetical) (Detail) link:calculationLink link:presentationLink link:definitionLink