The Company’s revenues are sourced from four geographic markets: North America, Europe, CIS and APAC. CIS includes revenues from customers in Belarus, Kazakhstan, Russia and Ukraine. APAC, which stands for Asia Pacific, includes revenues from customers in East Asia, Southeast Asia and Australia. The following tables present the disaggregation of the Company’s revenues by customer location, including a reconciliation of the disaggregated revenues with the reportable segments (Note 13 “Segment Information”) for the periods indicated:



	Three Months Ended September 30, 2019
	Reportable Segments
	North America		Europe		Russia		Total Segment Revenues		Other Income Included in Segment Revenues			Consolidated Revenues
Customer Locations
North America	$	349,875	$	8,484	$	42	$	358,401	$	—		$	358,401
Europe	6,756		182,621		23		189,400		(88		)	189,312
CIS	2,349		53		24,099		26,501		—			26,501
APAC	7		13,965		—		13,972		(83		)	13,889
Revenues	$	358,987	$	205,123	$	24,164	$	588,274	$	(171	)	$	588,103



	Nine Months Ended September 30, 2019
	Reportable Segments
	North America		Europe		Russia		Total Segment Revenues		Other Income Included in Segment Revenues			Consolidated Revenues
Customer Locations
North America	$	976,841	$	32,928	$	74	$	1,009,843	$	(2	)	$	1,009,841
Europe	16,736		523,487		263		540,486		(321		)	540,165
CIS	6,093		66		63,608		69,767		(1		)	69,766
APAC	1,045		40,317		—		41,362		(111		)	41,251
Revenues	$	1,000,715	$	596,798	$	63,945	$	1,661,458	$	(435	)	$	1,661,023



	Three Months Ended September 30, 2018
	Reportable Segments
	North America		Europe		Russia		Total Segment Revenues		Other Income Included in Segment Revenues			Consolidated Revenues
Customer Locations
North America	$	271,551	$	12,536	$	17	$	284,104	$	(27	)	$	284,077
Europe	5,408		146,990		3		152,401		(166		)	152,235
CIS	2,208		142		16,184		18,534		—			18,534
APAC	1,671		11,814		4		13,489		(149		)	13,340
Revenues	$	280,838	$	171,482	$	16,208	$	468,528	$	(342	)	$	468,186



	Nine Months Ended September 30, 2018
	Reportable Segments
	North America		Europe		Russia		Total Segment Revenues		Other Income Included in Segment Revenues			Consolidated Revenues
Customer Locations
North America	$	747,894	$	40,074	$	46	$	788,014	$	(40	)	$	787,974
Europe	11,234		444,468		45		455,747		(623		)	455,124
CIS	6,300		233		53,192		59,725		—			59,725
APAC	3,709		31,545		91		35,345		(187		)	35,158
Revenues	$	769,137	$	516,320	$	53,374	$	1,338,831	$	(850	)	$	1,337,981

The following tables present the disaggregation of the Company’s revenues by industry vertical, including a reconciliation of the disaggregated revenues with the reportable segments (Note 13 “Segment Information”) for the periods indicated:



	Three Months Ended September 30, 2019
	Reportable Segments
	North America		Europe		Russia		Total Segment Revenues		Other Income Included in Segment Revenues			Consolidated Revenues
Industry Verticals
Financial Services	$	50,510	$	61,189	$	18,760	$	130,459	$	(122	)	$	130,337
Travel & Consumer	51,476		57,780		3,171		112,427		(45		)	112,382
Software & Hi-Tech	90,880		16,952		552		108,384		—			108,384
Business Information & Media	65,153		40,624		22		105,799		—			105,799
Life Sciences & Healthcare	60,049		6,713		7		66,769		—			66,769
Emerging Verticals	40,919		21,865		1,652		64,436		(4		)	64,432
Revenues	$	358,987	$	205,123	$	24,164	$	588,274	$	(171	)	$	588,103



	Nine Months Ended September 30, 2019
	Reportable Segments
	North America		Europe		Russia		Total Segment Revenues		Other Income Included in Segment Revenues			Consolidated Revenues
Industry Verticals
Financial Services	$	132,435	$	182,143	$	49,801	$	364,379	$	(376	)	$	364,003
Travel & Consumer	146,654		169,157		8,056		323,867		(45		)	323,822
Software & Hi-Tech	255,601		56,764		1,470		313,835		(2		)	313,833
Business Information & Media	189,854		108,852		266		298,972		(6		)	298,966
Life Sciences & Healthcare	164,492		16,176		73		180,741		—			180,741
Emerging Verticals	111,679		63,706		4,279		179,664		(6		)	179,658
Revenues	$	1,000,715	$	596,798	$	63,945	$	1,661,458	$	(435	)	$	1,661,023



	Three Months Ended September 30, 2018
	Reportable Segments
	North America		Europe		Russia		Total Segment Revenues		Other Income Included in Segment Revenues			Consolidated Revenues
Industry Verticals
Financial Services	$	30,488	$	61,713	$	12,786	$	104,987	$	(189	)	$	104,798
Travel & Consumer	45,690		53,634		1,891		101,215		(122		)	101,093
Software & Hi-Tech	68,572		19,035		569		88,176		—			88,176
Business Information & Media	64,152		17,650		—		81,802		—			81,802
Life Sciences & Healthcare	39,550		5,078		12		44,640		(31		)	44,609
Emerging Verticals	32,386		14,372		950		47,708		—			47,708
Revenues	$	280,838	$	171,482	$	16,208	$	468,528	$	(342	)	$	468,186



	Nine Months Ended September 30, 2018
	Reportable Segments
	North America		Europe		Russia		Total Segment Revenues		Other Income Included in Segment Revenues			Consolidated Revenues
Industry Verticals
Financial Services	$	79,176	$	190,027	$	43,102	$	312,305	$	(697	)	$	311,608
Travel & Consumer	133,481		155,208		5,356		294,045		(122		)	293,923
Software & Hi-Tech	193,672		59,186		1,957		254,815		—			254,815
Business Information & Media	181,021		54,637		—		235,658		—			235,658
Life Sciences & Healthcare	99,893		15,550		12		115,455		(31		)	115,424
Emerging Verticals	81,894		41,712		2,947		126,553		—			126,553
Revenues	$	769,137	$	516,320	$	53,374	$	1,338,831	$	(850	)	$	1,337,981

The following tables present the disaggregation of the Company’s revenues by contract type including a reconciliation of the disaggregated revenues with the Company’s reportable segments (Note 13 “Segment Information”) for the periods indicated:



	Three Months Ended September 30, 2019
	Reportable Segments
	North America		Europe		Russia		Total Segment Revenues		Other Income Included in Segment Revenues			Consolidated Revenues
Contract Types
Time-and-material	$	322,573	$	171,261	$	13,815	$	507,649	$	—		$	507,649
Fixed-price	35,273		33,093		10,304		78,670		—			78,670
Licensing	883		149		9		1,041		—			1,041
Other revenues	258		620		36		914		(171		)	743
Revenues	$	358,987	$	205,123	$	24,164	$	588,274	$	(171	)	$	588,103



	Nine Months Ended September 30, 2019
	Reportable Segments
	North America		Europe		Russia		Total Segment Revenues		Other Income Included in Segment Revenues			Consolidated Revenues
Contract Types
Time-and-material	$	907,624	$	507,055	$	37,134	$	1,451,813	$	—		$	1,451,813
Fixed-price	89,694		87,543		26,534		203,771		—			203,771
Licensing	2,343		689		211		3,243		—			3,243
Other revenues	1,054		1,511		66		2,631		(435		)	2,196
Revenues	$	1,000,715	$	596,798	$	63,945	$	1,661,458	$	(435	)	$	1,661,023



	Three Months Ended September 30, 2018
	Reportable Segments
	North America		Europe		Russia		Total Segment Revenues		Other Income Included in Segment Revenues			Consolidated Revenues
Contract Types
Time-and-material	$	256,549	$	155,797	$	9,441	$	421,787	$	—		$	421,787
Fixed-price	23,241		15,001		6,759		45,001		—			45,001
Licensing	798		173		1		972		—			972
Other revenues	250		511		7		768		(342		)	426
Revenues	$	280,838	$	171,482	$	16,208	$	468,528	$	(342	)	$	468,186



	Nine Months Ended September 30, 2018
	Reportable Segments
	North America		Europe		Russia		Total Segment Revenues		Other Income Included in Segment Revenues			Consolidated Revenues
Contract Types
Time-and-material	$	704,612	$	471,900	$	29,302	$	1,205,814	$	—		$	1,205,814
Fixed-price	61,716		42,035		24,038		127,789		—			127,789
Licensing	2,098		1,119		12		3,229		—			3,229
Other revenues	711		1,266		22		1,999		(850		)	1,149
Revenues	$	769,137	$	516,320	$	53,374	$	1,338,831	$	(850	)	$	1,337,981



	Three Months Ended September 30, 2019
	Reportable Segments
	North America		Europe		Russia		Total Segment Revenues		Other Income Included in Segment Revenues			Consolidated Revenues
Timing of Revenue Recognition
Transferred at a point of time	$	561	$	290	$	54	$	905	$	(171	)	$	734
Transferred over time	358,426		204,833		24,110		587,369		—			587,369
Revenues	$	358,987	$	205,123	$	24,164	$	588,274	$	(171	)	$	588,103



	Nine Months Ended September 30, 2019
	Reportable Segments
	North America		Europe		Russia		Total Segment Revenues		Other Income Included in Segment Revenues			Consolidated Revenues
Timing of Revenue Recognition
Transferred at a point of time	$	1,185	$	692	$	55	$	1,932	$	(435	)	$	1,497
Transferred over time	999,530		596,106		63,890		1,659,526		—			1,659,526
Revenues	$	1,000,715	$	596,798	$	63,945	$	1,661,458	$	(435	)	$	1,661,023



	Three Months Ended September 30, 2018
	Reportable Segments
	North America		Europe		Russia		Total Segment Revenues		Other Income Included in Segment Revenues			Consolidated Revenues
Timing of Revenue Recognition
Transferred at a point of time	$	194	$	289	$	—	$	483	$	(342	)	$	141
Transferred over time	280,644		171,193		16,208		468,045		—			468,045
Revenues	$	280,838	$	171,482	$	16,208	$	468,528	$	(342	)	$	468,186



	Nine Months Ended September 30, 2018
	Reportable Segments
	North America		Europe		Russia		Total Segment Revenues		Other Income Included in Segment Revenues			Consolidated Revenues
Timing of Revenue Recognition
Transferred at a point of time	$	832	$	1,351	$	10	$	2,193	$	(850	)	$	1,343
Transferred over time	768,305		514,969		53,364		1,336,638		—			1,336,638
Revenues	$	769,137	$	516,320	$	53,374	$	1,338,831	$	(850	)	$	1,337,981

During the three and nine months ended September 30, 2019 the Company recognized $4,915 and $7,039 of revenues, respectively, from performance obligations satisfied in previous periods compared to $3,610 and $6,627 during the three and nine months ended September 30, 2018, respectively.

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 September 30, 2019. 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	$	12,226	$	2,774	$	140	$	—	$	15,140

The Company applies a practical expedient and does not disclose the amount of the transaction price allocated to the remaining performance obligations nor provide an explanation of when the Company expects to recognize that amount as revenue for certain variable consideration.

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



	As of September 30, 2019		As of December 31, 2018
Contract assets included in Unbilled revenues	$	24,870	$	13,522
Contract liabilities included in Accrued expenses and other current liabilities	$	4,954	$	4,558
Contract liabilities included in Other noncurrent liabilities	$	1	$	224

Contract assets included in Unbilled revenues are recorded when services have been provided but the Company does not have an unconditional right to receive consideration. The Company recognizes an impairment loss when the contract carrying amount is greater than the remaining consideration expected less the remaining costs of providing services. Contract assets have increased from December 31, 2018 primarily due to new contracts entered into in the nine months ended September 30, 2019 where the Company’s right to bill is contingent upon achievement of contractual milestones.

Contract liabilities comprise amounts collected from the Company’s customers for revenues not yet earned. Such amounts are anticipated to be recorded as revenues when services are performed in subsequent periods. Contract liabilities have increased from December 31, 2018 primarily due to the acquisition of test IO on April 30, 2019. During the three and nine months ended September 30, 2019, the Company recognized $140 and $3,801, respectively, of revenues that were included in Accrued expenses and other current liabilities at December 31, 2018.