0001001 - Document - Cover page link:presentationLink link:calculationLink link:definitionLink 0002002 - Document - Audit Information link:presentationLink link:calculationLink link:definitionLink 1001003 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS link:presentationLink link:calculationLink link:definitionLink 1002004 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME link:presentationLink link:calculationLink link:definitionLink 1003005 - Statement - CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 1004006 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 1005007 - Statement - CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 1006008 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 2101101 - Disclosure - ORGANIZATION link:presentationLink link:calculationLink link:definitionLink 2402401 - Disclosure - ORGANIZATION (Details) link:presentationLink link:calculationLink link:definitionLink 2103102 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 2204201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 2305301 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) link:presentationLink link:calculationLink link:definitionLink 2406402 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Revenue Recognition) (Details) link:presentationLink link:calculationLink link:definitionLink 2407403 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Foreign Currency Translation and Accumulated Other Comprehensive Loss) (Details) link:presentationLink link:calculationLink link:definitionLink 2408404 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Advertising Costs) (Details) link:presentationLink link:calculationLink link:definitionLink 2409405 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Stock-Based Compensation) (Details) link:presentationLink link:calculationLink link:definitionLink 2410406 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Cash Reconciliation) (Details) link:presentationLink link:calculationLink link:definitionLink 2411407 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Allowance for Credit Losses) (Details) link:presentationLink link:calculationLink link:definitionLink 2412408 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Property and Equipment) (Details) link:presentationLink link:calculationLink link:definitionLink 2413409 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Long-Lived Assets, Intangible Assets and Goodwill) (Details) link:presentationLink link:calculationLink link:definitionLink 2414410 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Recent Accounting Pronouncements) (Details) link:presentationLink link:calculationLink link:definitionLink 2115103 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS link:presentationLink link:calculationLink link:definitionLink 2316302 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables) link:presentationLink link:calculationLink link:definitionLink 2417411 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS (Disaggregated Revenue) (Details) link:presentationLink link:calculationLink link:definitionLink 2418412 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS (Contract Assets and Liabilities) (Details) link:presentationLink link:calculationLink link:definitionLink 2419413 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS (Contract Assets) (Details) link:presentationLink link:calculationLink link:definitionLink 2420414 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS (Commissions) (Details) link:presentationLink link:calculationLink link:definitionLink 2421415 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS (Unsatisfied Performance Obligations) (Details) link:presentationLink link:calculationLink link:definitionLink 2421415 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS (Unsatisfied Performance Obligations) (Details) link:presentationLink link:calculationLink link:definitionLink 2122104 - Disclosure - ALLOWANCE FOR CREDIT LOSSES link:presentationLink link:calculationLink link:definitionLink 2323303 - Disclosure - ALLOWANCE FOR CREDIT LOSSES (Tables) link:presentationLink link:calculationLink link:definitionLink 2424416 - Disclosure - ALLOWANCE FOR CREDIT LOSSES (Details) link:presentationLink link:calculationLink link:definitionLink 2125105 - Disclosure - ACQUISITIONS link:presentationLink link:calculationLink link:definitionLink 2326304 - Disclosure - ACQUISITIONS (Tables) link:presentationLink link:calculationLink link:definitionLink 2427417 - Disclosure - ACQUISITIONS (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2428418 - Disclosure - ACQUISITIONS (Schedule of Recognized Identified Assets Acquired and Liabilities Assumed) (Details) link:presentationLink link:calculationLink link:definitionLink 2429419 - Disclosure - ACQUISITIONS (Intangible Assets Acquired) (Details) link:presentationLink link:calculationLink link:definitionLink 2430420 - Disclosure - ACQUISITIONS (Business Acquisition, Pro Forma Information) (Details) link:presentationLink link:calculationLink link:definitionLink 2131106 - Disclosure - INVESTMENTS AND FAIR VALUE MEASUREMENTS link:presentationLink link:calculationLink link:definitionLink 2432421 - Disclosure - INVESTMENTS AND FAIR VALUE MEASUREMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 2133107 - Disclosure - LEASES link:presentationLink link:calculationLink link:definitionLink 2334305 - Disclosure - LEASES (Tables) link:presentationLink link:calculationLink link:definitionLink 2435422 - Disclosure - LEASES (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2436423 - Disclosure - LEASES (Lease Cost) (Details) link:presentationLink link:calculationLink link:definitionLink 2437424 - Disclosure - LEASES (Supplemental Balance Sheet Information Related to Leases) (Details) link:presentationLink link:calculationLink link:definitionLink 2438425 - Disclosure - LEASES (Supplemental Cash Flow Information Related to Leases) (Details) link:presentationLink link:calculationLink link:definitionLink 2139108 - Disclosure - PROPERTY AND EQUIPMENT link:presentationLink link:calculationLink link:definitionLink 2340306 - Disclosure - PROPERTY AND EQUIPMENT (Tables) link:presentationLink link:calculationLink link:definitionLink 2441426 - Disclosure - PROPERTY AND EQUIPMENT (Details) link:presentationLink link:calculationLink link:definitionLink 2142109 - Disclosure - GOODWILL link:presentationLink link:calculationLink link:definitionLink 2343307 - Disclosure - GOODWILL (Tables) link:presentationLink link:calculationLink link:definitionLink 2444427 - Disclosure - GOODWILL (Goodwill by Segment) (Details) link:presentationLink link:calculationLink link:definitionLink 2445428 - Disclosure - GOODWILL (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2146110 - Disclosure - INTANGIBLE ASSETS link:presentationLink link:calculationLink link:definitionLink 2347308 - Disclosure - INTANGIBLE ASSETS (Tables) link:presentationLink link:calculationLink link:definitionLink 2448429 - Disclosure - INTANGIBLE ASSETS (Details) link:presentationLink link:calculationLink link:definitionLink 2449430 - Disclosure - INTANGIBLE ASSETS (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2150111 - Disclosure - LONG-TERM DEBT link:presentationLink link:calculationLink link:definitionLink 2351309 - Disclosure - LONG-TERM DEBT (Tables) link:presentationLink link:calculationLink link:definitionLink 2452431 - Disclosure - LONG-TERM DEBT (Schedule of Debt) (Details) link:presentationLink link:calculationLink link:definitionLink 2453432 - Disclosure - LONG-TERM DEBT (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2454433 - Disclosure - LONG-TERM DEBT (Interest) (Details) link:presentationLink link:calculationLink link:definitionLink 2155112 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 2356310 - Disclosure - INCOME TAXES (Tables) link:presentationLink link:calculationLink link:definitionLink 2457434 - Disclosure - INCOME TAXES (Components for Provision for Income Taxes) (Details) link:presentationLink link:calculationLink link:definitionLink 2458435 - Disclosure - INCOME TAXES (Components of Deferred Tax Assets and Liabilities) (Details) link:presentationLink link:calculationLink link:definitionLink 2459436 - Disclosure - INCOME TAXES (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2460437 - Disclosure - INCOME TAXES (Reconciliation of Provision for Income Taxes) (Details) link:presentationLink link:calculationLink link:definitionLink 2461438 - Disclosure - INCOME TAXES (Unrecognized Tax Benefits) (Details) link:presentationLink link:calculationLink link:definitionLink 2162113 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 2363311 - Disclosure - COMMITMENTS AND CONTINGENCIES (Tables) link:presentationLink link:calculationLink link:definitionLink 2464439 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details) link:presentationLink link:calculationLink link:definitionLink 2165114 - Disclosure - SEGMENT REPORTING link:presentationLink link:calculationLink link:definitionLink 2366312 - Disclosure - SEGMENT REPORTING (Tables) link:presentationLink link:calculationLink link:definitionLink 2467440 - Disclosure - SEGMENT REPORTING (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2468441 - Disclosure - SEGMENT REPORTING (EBITDA) (Details) link:presentationLink link:calculationLink link:definitionLink 2469442 - Disclosure - SEGMENT REPORTING (Reconciliation of Net Income (Loss) to EBITDA) (Details) link:presentationLink link:calculationLink link:definitionLink 2470443 - Disclosure - SEGMENT REPORTING (Summarized Information) (Details) link:presentationLink link:calculationLink link:definitionLink 2171115 - Disclosure - STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 2472444 - Disclosure - STOCKHOLDERS' EQUITY (Details) link:presentationLink link:calculationLink link:definitionLink 2173116 - Disclosure - NET INCOME PER SHARE link:presentationLink link:calculationLink link:definitionLink 2374313 - Disclosure - NET INCOME PER SHARE (Tables) link:presentationLink link:calculationLink link:definitionLink 2475445 - Disclosure - NET INCOME PER SHARE (Details) link:presentationLink link:calculationLink link:definitionLink 2176117 - Disclosure - EMPLOYEE BENEFIT PLANS link:presentationLink link:calculationLink link:definitionLink 2377314 - Disclosure - EMPLOYEE BENEFIT PLANS (Tables) link:presentationLink link:calculationLink link:definitionLink 2478446 - Disclosure - EMPLOYEE BENEFIT PLANS (Stock Incentive Plans - Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2479447 - Disclosure - EMPLOYEE BENEFIT PLANS (Stock Option Activity) (Details) link:presentationLink link:calculationLink link:definitionLink 2480448 - Disclosure - EMPLOYEE BENEFIT PLANS (Assumptions) (Details) link:presentationLink link:calculationLink link:definitionLink 2481449 - Disclosure - EMPLOYEE BENEFIT PLANS (Information Regarding Stock Options) (Details) link:presentationLink link:calculationLink link:definitionLink 2482450 - Disclosure - EMPLOYEE BENEFIT PLANS (Restrictive Stock Award Activity) (Details) link:presentationLink link:calculationLink link:definitionLink 2483451 - Disclosure - EMPLOYEE BENEFIT PLANS (Restrictive Stock Units) (Details) link:presentationLink link:calculationLink link:definitionLink 2484452 - Disclosure - EMPLOYEE BENEFIT PLANS (MSU and DSU Activity) (Details) link:presentationLink link:calculationLink link:definitionLink 2485453 - 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 2186118 - Disclosure - Schedule II Valuation and Qualifying Accounts link:presentationLink link:calculationLink link:definitionLink 2487454 - Disclosure - Schedule II Valuation and Qualifying Accounts (Details) link:presentationLink link:calculationLink link:definitionLink