0000001 - Document - Cover page link:presentationLink link:calculationLink link:definitionLink 0000002 - Document - Audit Information link:presentationLink link:calculationLink link:definitionLink 0000003 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS link:presentationLink link:calculationLink link:definitionLink 0000004 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME link:presentationLink link:calculationLink link:definitionLink 0000005 - Statement - CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 0000006 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 0000007 - Statement - CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 0000008 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 0000009 - Disclosure - ORGANIZATION link:presentationLink link:calculationLink link:definitionLink 0000010 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 0000011 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS link:presentationLink link:calculationLink link:definitionLink 0000012 - Disclosure - ALLOWANCE FOR CREDIT LOSSES link:presentationLink link:calculationLink link:definitionLink 0000013 - Disclosure - ACQUISITIONS link:presentationLink link:calculationLink link:definitionLink 0000014 - Disclosure - INVESTMENTS AND FAIR VALUE MEASUREMENTS link:presentationLink link:calculationLink link:definitionLink 0000015 - Disclosure - LEASES link:presentationLink link:calculationLink link:definitionLink 0000016 - Disclosure - PROPERTY AND EQUIPMENT link:presentationLink link:calculationLink link:definitionLink 0000017 - Disclosure - GOODWILL link:presentationLink link:calculationLink link:definitionLink 0000018 - Disclosure - INTANGIBLE ASSETS link:presentationLink link:calculationLink link:definitionLink 0000019 - Disclosure - LONG-TERM DEBT link:presentationLink link:calculationLink link:definitionLink 0000020 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 0000021 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 0000022 - Disclosure - SEGMENT REPORTING link:presentationLink link:calculationLink link:definitionLink 0000023 - Disclosure - STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 0000024 - Disclosure - NET INCOME PER SHARE link:presentationLink link:calculationLink link:definitionLink 0000025 - Disclosure - EMPLOYEE BENEFIT PLANS link:presentationLink link:calculationLink link:definitionLink 0000026 - Disclosure - SUBSEQUENT EVENTS link:presentationLink link:calculationLink link:definitionLink 9954471 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 9954472 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9954473 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables) link:presentationLink link:calculationLink link:definitionLink 9954474 - Disclosure - ALLOWANCE FOR CREDIT LOSSES (Tables) link:presentationLink link:calculationLink link:definitionLink 9954475 - Disclosure - ACQUISITIONS (Tables) link:presentationLink link:calculationLink link:definitionLink 9954476 - Disclosure - LEASES (Tables) link:presentationLink link:calculationLink link:definitionLink 9954477 - Disclosure - PROPERTY AND EQUIPMENT (Tables) link:presentationLink link:calculationLink link:definitionLink 9954478 - Disclosure - GOODWILL (Tables) link:presentationLink link:calculationLink link:definitionLink 9954479 - Disclosure - INTANGIBLE ASSETS (Tables) link:presentationLink link:calculationLink link:definitionLink 9954480 - Disclosure - LONG-TERM DEBT (Tables) link:presentationLink link:calculationLink link:definitionLink 9954481 - Disclosure - INCOME TAXES (Tables) link:presentationLink link:calculationLink link:definitionLink 9954482 - Disclosure - COMMITMENTS AND CONTINGENCIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9954483 - Disclosure - SEGMENT REPORTING (Tables) link:presentationLink link:calculationLink link:definitionLink 9954484 - Disclosure - NET INCOME PER SHARE (Tables) link:presentationLink link:calculationLink link:definitionLink 9954485 - Disclosure - EMPLOYEE BENEFIT PLANS (Tables) link:presentationLink link:calculationLink link:definitionLink 9954486 - Disclosure - ORGANIZATION (Details) link:presentationLink link:calculationLink link:definitionLink 9954487 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Revenue Recognition) (Details) link:presentationLink link:calculationLink link:definitionLink 9954488 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Foreign Currency Translation and Accumulated Other Comprehensive Loss) (Details) link:presentationLink link:calculationLink link:definitionLink 9954489 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Advertising Costs) (Details) link:presentationLink link:calculationLink link:definitionLink 9954490 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Stock-Based Compensation) (Details) link:presentationLink link:calculationLink link:definitionLink 9954491 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Cash Reconciliation) (Details) link:presentationLink link:calculationLink link:definitionLink 9954492 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Allowance for Credit Losses) (Details) link:presentationLink link:calculationLink link:definitionLink 9954493 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Property and Equipment) (Details) link:presentationLink link:calculationLink link:definitionLink 9954494 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Long-Lived Assets, Intangible Assets and Goodwill) (Details) link:presentationLink link:calculationLink link:definitionLink 9954495 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Recent Accounting Pronouncements) (Details) link:presentationLink link:calculationLink link:definitionLink 9954496 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS (Disaggregated Revenue) (Details) link:presentationLink link:calculationLink link:definitionLink 9954497 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS (Deferred Revenue) (Details) link:presentationLink link:calculationLink link:definitionLink 9954498 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS (Contract Assets and Liabilities) (Details) link:presentationLink link:calculationLink link:definitionLink 9954499 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS (Contract Assets) (Details) link:presentationLink link:calculationLink link:definitionLink 9954500 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS (Commissions) (Details) link:presentationLink link:calculationLink link:definitionLink 9954501 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS (Unsatisfied Performance Obligations) (Details) link:presentationLink link:calculationLink link:definitionLink 9954501 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS (Unsatisfied Performance Obligations) (Details) link:presentationLink link:calculationLink link:definitionLink 9954502 - Disclosure - ALLOWANCE FOR CREDIT LOSSES (Details) link:presentationLink link:calculationLink link:definitionLink 9954503 - Disclosure - ACQUISITIONS (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 9954504 - Disclosure - ACQUISITIONS (Schedule of Recognized Identified Assets Acquired and Liabilities Assumed) (Details) link:presentationLink link:calculationLink link:definitionLink 9954505 - Disclosure - ACQUISITIONS (Intangible Assets Acquired) (Details) link:presentationLink link:calculationLink link:definitionLink 9954506 - Disclosure - ACQUISITIONS (Business Acquisition, Pro Forma Information) (Details) link:presentationLink link:calculationLink link:definitionLink 9954507 - Disclosure - ACQUISITIONS (Pro Forma Information) (Details) link:presentationLink link:calculationLink link:definitionLink 9954508 - Disclosure - INVESTMENTS AND FAIR VALUE MEASUREMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 9954509 - Disclosure - LEASES (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 9954510 - Disclosure - LEASES (Lease Cost) (Details) link:presentationLink link:calculationLink link:definitionLink 9954511 - Disclosure - LEASES (Supplemental Balance Sheet Information Related to Leases) (Details) link:presentationLink link:calculationLink link:definitionLink 9954512 - Disclosure - LEASES (Supplemental Cash Flow Information Related to Leases) (Details) link:presentationLink link:calculationLink link:definitionLink 9954513 - Disclosure - PROPERTY AND EQUIPMENT (Details) link:presentationLink link:calculationLink link:definitionLink 9954514 - Disclosure - GOODWILL (Goodwill by Segment) (Details) link:presentationLink link:calculationLink link:definitionLink 9954515 - Disclosure - GOODWILL (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 9954516 - Disclosure - INTANGIBLE ASSETS (Details) link:presentationLink link:calculationLink link:definitionLink 9954517 - Disclosure - INTANGIBLE ASSETS (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 9954518 - Disclosure - LONG-TERM DEBT (Schedule of Debt) (Details) link:presentationLink link:calculationLink link:definitionLink 9954519 - Disclosure - LONG-TERM DEBT (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 9954520 - Disclosure - LONG-TERM DEBT (Interest) (Details) link:presentationLink link:calculationLink link:definitionLink 9954521 - Disclosure - INCOME TAXES (Components for Provision for Income Taxes) (Details) link:presentationLink link:calculationLink link:definitionLink 9954522 - Disclosure - INCOME TAXES (Components of Deferred Tax Assets and Liabilities) (Details) link:presentationLink link:calculationLink link:definitionLink 9954523 - Disclosure - INCOME TAXES (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 9954524 - Disclosure - INCOME TAXES (Reconciliation of Provision for Income Taxes) (Details) link:presentationLink link:calculationLink link:definitionLink 9954525 - Disclosure - INCOME TAXES (Unrecognized Tax Benefits) (Details) link:presentationLink link:calculationLink link:definitionLink 9954526 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details) link:presentationLink link:calculationLink link:definitionLink 9954527 - Disclosure - SEGMENT REPORTING (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 9954528 - Disclosure - SEGMENT REPORTING (EBITDA) (Details) link:presentationLink link:calculationLink link:definitionLink 9954529 - Disclosure - SEGMENT REPORTING (Reconciliation of Net Income (Loss) to EBITDA) (Details) link:presentationLink link:calculationLink link:definitionLink 9954530 - Disclosure - SEGMENT REPORTING (Summarized Information) (Details) link:presentationLink link:calculationLink link:definitionLink 9954531 - Disclosure - STOCKHOLDERS' EQUITY (Details) link:presentationLink link:calculationLink link:definitionLink 9954532 - Disclosure - NET INCOME PER SHARE (Details) link:presentationLink link:calculationLink link:definitionLink 9954533 - Disclosure - EMPLOYEE BENEFIT PLANS (Stock Incentive Plans - Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 9954534 - Disclosure - EMPLOYEE BENEFIT PLANS (Stock Option Activity) (Details) link:presentationLink link:calculationLink link:definitionLink 9954535 - Disclosure - EMPLOYEE BENEFIT PLANS (Assumptions) (Details) link:presentationLink link:calculationLink link:definitionLink 9954536 - Disclosure - EMPLOYEE BENEFIT PLANS (Information Regarding Stock Options) (Details) link:presentationLink link:calculationLink link:definitionLink 9954537 - Disclosure - EMPLOYEE BENEFIT PLANS (Restrictive Stock Award Activity) (Details) link:presentationLink link:calculationLink link:definitionLink 9954538 - Disclosure - EMPLOYEE BENEFIT PLANS (Restrictive Stock Units) (Details) link:presentationLink link:calculationLink link:definitionLink 9954539 - Disclosure - EMPLOYEE BENEFIT PLANS (MSU and DSU Activity) (Details) link:presentationLink link:calculationLink link:definitionLink 9954540 - Disclosure - EMPLOYEE BENEFIT PLANS (Employee 401(k) Plan, Employee Pension Plan, Registered Retirement Savings Plan and Employee Stock Purchase Plan) (Details) link:presentationLink link:calculationLink link:definitionLink 9954541 - Disclosure - SUBSEQUENT EVENTS (Details) link:presentationLink link:calculationLink link:definitionLink