FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Dec. 31, 2016

Fair Value Disclosures [Abstract]

Financial Liabilities Measured at Fair Value on a Recurring Basis

The following tables show the fair values of the Company’s financial liabilities measured at fair value on a recurring basis as of December 31, 2016 and 2015:

	As of December 31, 2016
	Balance		Level 1		Level 2		Level 3
Performance-based equity awards	$	3,789	$	3,789	$	—	$	—
Cash-settled restricted stock units	2,111		2,111		—		—
Total liabilities measured at fair value on a recurring basis	$	5,900	$	5,900	$	—	$	—

	As of December 31, 2015
	Balance		Level 1		Level 2		Level 3
Performance-based equity awards	$	5,364	$	—	$	—	$	5,364
Total liabilities measured at fair value on a recurring basis	$	5,364	$	—	$	—	$	5,364

Reconciliation of Liabilities Measured on Recurring Basis, Unobservable Input

The fair value of the cash-settled restricted stock units is measured using prices for which observable market information is available.

A reconciliation of the beginning and ending balances of acquisition-related contractual contingent liabilities using significant unobservable inputs (Level 3) for the years ended December 31, 2016 and 2015, was as follows:

	Amount
Contractual contingent liabilities at January 1, 2014	$	—
Acquisition date fair value of contractual contingent liabilities — Netsoft	1,825
Acquisition date fair value of contractual contingent liabilities — Jointech	20,000
Acquisition date fair value of contractual contingent liabilities — GGA	11,400
Acquisition date fair value of contractual contingent liabilities — Great Fridays	1,173
Liability-classified stock-based awards	3,088
Changes in fair value of contractual contingent liabilities included in earnings	2,059
Changes in fair value of contractual contingent liabilities recorded against goodwill	1,366
Effect of net foreign currency exchange rate changes	(288		)
Contractual contingent liabilities at December 31, 2014	40,623
Liability-classified stock-based awards	5,148
Changes in fair value of contractual contingent liabilities included in earnings	4,355
Effect of net foreign currency exchange rate changes	246
Settlements of contractual contingent liabilities	(45,008		)
Contractual contingent liabilities at December 31, 2015	5,364
Acquisition date fair value of contractual contingent liabilities — other acquisitions	800
Liability-classified stock-based awards	5,148
Changes in fair value of contractual contingent liabilities included in earnings	1,232
Changes in fair value of contractual contingent liabilities recorded against goodwill	200
Settlements of contractual contingent liabilities	(8,955		)
Reclassification of contractual contingent liabilities out of Level 3	(3,789		)
Contractual contingent liabilities at December 31, 2016	$	—

Financial Assets and Liabilities not Measured on a Recurring Basis

The following tables present the reported amounts and estimated fair values of the financial assets and liabilities not carried at fair value on a recurring basis, as they would be categorized within the fair-value hierarchy, as of the dates indicated:

					Fair Value Hierarchy
	Balance		Estimated Fair Value		Level 1		Level 2		Level 3
December 31, 2016
Financial Assets:
Cash and cash equivalents	$	362,025	$	362,025	$	362,025	$	—	$	—
Time deposits and restricted cash	$	3,042	$	3,042	$	—	$	3,042	$	—
Employee loans	$	5,978	$	5,978	$	—	$	—	$	5,978
Financial Liabilities:
Borrowing under 2014 Credit Facility	$	25,019	$	25,019	$	—	$	25,019	$	—

					Fair Value Hierarchy
	Balance		Estimated Fair Value		Level 1		Level 2		Level 3
December 31, 2015
Financial Assets:
Cash and cash equivalents	$	199,449	$	199,449	$	199,449	$	—	$	—
Time deposits and restricted cash	$	30,419	$	30,419	$	—	$	30,419	$	—
Employee loans	$	6,338	$	6,338	$	—	$	—	$	6,338
Financial Liabilities:
Borrowing under 2014 Credit Facility	$	35,000	$	35,000	$	—	$	35,000	$	—