SEGMENTS INFORMATION (Tables)

9 Months Ended

Sep. 30, 2016

Segment Reporting [Abstract]

Revenues from External Customers and Segment Operating Profit Before Unallocated Expenses

Revenues from external customers and operating profit/(loss), before unallocated expenses, for the North America, Europe, Russia and Other reportable segments for the three and nine months ended September 30, 2016 and 2015, were as follows:

	Three Months Ended   September 30,				Nine Months Ended   September 30,
	2016		2015		2016		2015
Segment revenues:
North America	$	161,655	$	121,746	$	466,255	$	330,228
Europe	126,265		103,514		349,834		292,826
Russia	10,434		9,707		31,056		27,432
Other	—		1,207		—		3,951
Total segment revenues	$	298,354	$	236,174	$	847,145	$	654,437
Segment operating profit/(loss):
North America	$	34,699	$	28,906	$	103,693	$	78,720
Europe	19,548		17,021		49,793		49,031
Russia	1,208		1,626		5,244		3,095
Other	—		168		—		(12		)
Total segment operating profit	$	55,455	$	47,721	$	158,730	$	130,834

Reconciliation of Segment Revenues and Operating Profit to Consolidated Income Before Provision for Income Taxes

Reconciliation of segment revenues to consolidated revenues and segment operating profit to consolidated income before provision for income taxes is presented below:

	Three Months Ended   September 30,						Nine Months Ended   September 30,
	2016			2015			2016			2015
Total segment revenues	$	298,354		$	236,174		$	847,145		$	654,437
Less: Other income	(61		)	(125		)	(538		)	(562		)
Revenues	$	298,293		$	236,049		$	846,607		$	653,875
Total segment operating profit:	$	55,455		$	47,721		$	158,730		$	130,834
Unallocated amounts:
Other income	(61		)	(125		)	(538		)	(562		)
Stock-based compensation expense	(13,826		)	(11,963		)	(37,520		)	(33,350		)
Non-corporate taxes	(1,588		)	(1,120		)	(4,105		)	(2,858		)
Professional fees	(1,470		)	(1,572		)	(5,656		)	(5,423		)
Depreciation and amortization	(2,027		)	(1,312		)	(6,294		)	(3,919		)
Bank charges	(370		)	(340		)	(1,097		)	(1,021		)
One-time charges	(7		)	—			(314		)	—
Other corporate expenses	(2,204		)	(3,513		)	(6,893		)	(9,499		)
Income from operations	33,902			27,776			96,313			74,202
Interest and other income, net	1,067			865			3,416			3,322
Foreign exchange (loss)/gain	(1,728		)	32			(5,313		)	(6,187		)
Income before provision for income taxes	$	33,241		$	28,673		$	94,416		$	71,337

Geographical Information of Long-Lived Assets Based on Physical Location

Geographical information about the Company’s long-lived assets based on physical location of the assets was as follows:

	As of    September 30,   2016		As of    December 31,   2015
Belarus	$	44,942	$	44,879
Ukraine	5,735		4,487
Russia	4,851		2,084
Hungary	3,945		2,485
United States	2,685		1,969
Poland	2,135		1,088
China	1,715		514
India	1,594		1,099
Other	2,682		1,894
Total	$	70,284	$	60,499

Revenues by Client Location

Information about the Company’s revenues by client location is as follows:

	Three Months Ended   September 30,				Nine Months Ended   September 30,
	2016		2015		2016		2015
United States	$	153,818	$	110,191	$	435,258	$	299,606
United Kingdom	43,535		41,324		131,541		121,312
Switzerland	31,550		28,370		94,771		81,654
Canada	14,526		14,695		45,400		40,394
Germany	12,325		10,378		30,694		26,216
Russia	9,833		9,469		29,269		26,526
Sweden	6,256		3,020		16,204		7,479
Hong Kong	4,839		5,758		15,684		17,030
Netherlands	4,302		2,630		10,014		6,984
Belgium	2,676		2,154		7,329		5,307
China	2,050		276		2,757		411
Spain	1,821		334		2,635		513
Ireland	1,315		1,554		3,795		4,374
Italy	1,103		602		2,732		1,695
Other locations	5,185		2,417		9,793		7,398
Reimbursable expenses and other revenues	3,159		2,877		8,731		6,976
Revenues	$	298,293	$	236,049	$	846,607	$	653,875