REVENUES REVENUES (Tables)

12 Months Ended

Dec. 31, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenues

The following tables show the disaggregation of the Company’s revenues by major customer location, including a reconciliation of the disaggregated revenues with the Company’s reportable segments (Note 15 “Segment Information”) for the year ended December 31, 2018:

	Year Ended December 31, 2018
Reportable Segments	North America		Europe		Russia		Total Segment Revenues		Other Income Included in Segment Revenues				Consolidated Revenues
Customer Locations
North America	$	1,046,333	$	52,859	$	75	$	1,099,267	$	(100	)	—	$	1,099,167
Europe	16,693		596,559		52		613,304		(832		)	—	612,472
CIS	8,437		336		72,930		81,703		—			—	81,703
APAC	5,631		44,113		91		49,835		(265		)	—	49,570
Revenues	$	1,077,094	$	693,867	$	73,148	$	1,844,109	$	(1,197	)		$	1,842,912

The following tables show the disaggregation of the Company’s revenues by industry vertical, including a reconciliation of the disaggregated revenues with the Company’s reportable segments (Note 15 “Segment Information”) for the year ended December 31, 2018:

	Year Ended December 31, 2018
Reportable Segments	North America		Europe		Russia		Total Segment Revenues		Other Income Included in Segment Revenues			Consolidated Revenues
Industry Verticals
Financial Services	$	112,528	$	253,089	$	59,337	$	424,954	$	(977	)	$	423,977
Travel & Consumer	177,913		208,445		7,467		393,825		(182		)	393,643
Software & Hi-Tech	269,067		79,121		2,627		350,815		—			350,815
Business Information & Media	251,081		72,898		54		324,033		—			324,033
Life Sciences & Healthcare	151,449		20,272		13		171,734		(31		)	171,703
Emerging Verticals	115,056		60,042		3,650		178,748		(7		)	178,741
Revenues	$	1,077,094	$	693,867	$	73,148	$	1,844,109	$	(1,197	)	$	1,842,912

The following tables show the disaggregation of the Company’s revenues by contract type, including a reconciliation of the disaggregated revenues with the Company’s reportable segments (Note 15 “Segment Information”) for the year ended December 31, 2018:

	Year Ended December 31, 2018
Reportable Segments	North America		Europe		Russia		Total Segment Revenues		Other Income Included in Segment Revenues			Consolidated Revenues
Contract Types
Time-and-material	$	983,433	$	628,710	$	40,754	$	1,652,897	$	—		$	1,652,897
Fixed-price	89,831		62,078		32,342		184,251		—			184,251
Licensing	2,748		1,332		17		4,097		—			4,097
Other revenues	1,082		1,747		35		2,864		(1,197		)	1,667
Revenues	$	1,077,094	$	693,867	$	73,148	$	1,844,109	$	(1,197	)	$	1,842,912

Timing of Revenue Recognition

The following tables show the timing of revenue recognition:

	Year Ended December 31, 2018
Reportable Segments	North America		Europe		Russia		Total Segment Revenues		Other Income Included in Segment Revenues			Consolidated Revenues
Timing of Revenue Recognition
Transferred over time	$	1,076,083	$	692,024	$	73,135	$	1,841,242	$	—		$	1,841,242
Transferred at a point of time	1,011		1,843		13		2,867		(1,197		)	1,670
Revenues	$	1,077,094	$	693,867	$	73,148	$	1,844,109	$	(1,197	)	$	1,842,912

Timing of Revenue Recognition

The following table includes the estimated revenues expected to be recognized in the future related to performance obligations that are partially or fully unsatisfied as of December 31, 2018. The Company applies a practical expedient and does not disclose the value of unsatisfied performance obligations for contracts that (i) have an original expected duration of one year or less and (ii) contracts for which it recognizes revenues at the amount to which it has the right to invoice for services provided:

	Less than 1 year		1 Year		2 Years		3 Years		Total
Contract Type
Fixed-price	$	7,202	$	402	$	56	$	—	$	7,660

Contract Balances

The following table provides information on the classification of contract assets and liabilities in the consolidated balance sheets:

	As of    December 31,   2018		As of January 1, 2018
Contract assets included in Unbilled revenues	$	13,522	$	7,901
Contract liabilities included in Accrued expenses and other current liabilities	$	4,558	$	4,498
Contract liabilities included in Other noncurrent liabilities	$	224	$	—