SEGMENTS INFORMATION (Tables)

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Revenues from External Customers and Operating Profit/(Loss) Before Unallocated Expenses

Revenues from external customers and operating profit, before unallocated expenses, by reportable segments for the three and six months ended June 30, 2018 and 2017, were as follows:

	Three Months Ended   June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Segment revenues:
North America	$	257,103	$	194,025	$	488,299	$	372,328
Europe	171,495		141,319		344,838		274,026
Russia	17,380		13,677		37,166		27,370
Total segment revenues	$	445,978	$	349,021	$	870,303	$	673,724
Segment operating profit:
North America	$	51,221	$	43,622	$	95,181	$	80,714
Europe	26,568		20,658		55,458		40,469
Russia	2,321		1,895		7,668		5,444
Total segment operating profit	$	80,110	$	66,175	$	158,307	$	126,627

Reconciliation of Segment Revenues to Consolidated Revenues and Segment 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   June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Total segment revenues	$	445,978		$	349,021		$	870,303		$	673,724
Other income included in segment revenues	(331		)	(44		)	(508		)	(96		)
Revenues	$	445,647		$	348,977		$	869,795		$	673,628
Total segment operating profit:	$	80,110		$	66,175		$	158,307		$	126,627
Unallocated amounts:
Other income included in segment revenues	(331		)	(44		)	(508		)	(96		)
Stock-based compensation expense	(14,810		)	(12,927		)	(31,406		)	(28,703		)
Non-corporate taxes	(2,418		)	(1,795		)	(4,978		)	(5,246		)
Professional fees	(1,400		)	(2,476		)	(3,316		)	(4,820		)
Depreciation and amortization expense	(1,974		)	(1,905		)	(3,743		)	(3,880		)
Bank charges	(579		)	(446		)	(1,168		)	(843		)
One-time charges and other acquisition-related expenses	(1,241		)	(330		)	(1,861		)	(898		)
Other operating expenses	(3,120		)	(5,570		)	(8,393		)	(10,493		)
Income from operations	54,237			40,682			102,934			71,648
Interest and other income, net	1,052			802			501			1,386
Foreign exchange gain/(loss)	1,830			1,562			1,583			(1,393		)
Income before provision for income taxes	$	57,119		$	43,046		$	105,018		$	71,641

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 is presented below:

	As of    June 30,   2018		As of    December 31,   2017
Belarus	$	48,426	$	49,866
United States	11,541		3,371
Russia	10,521		9,617
India	7,472		2,698
Ukraine	6,818		6,995
Hungary	3,350		3,901
China	3,275		2,608
Other	7,047		7,363
Total	$	98,450	$	86,419

Revenues by Client Location

The table below presents information about the Company’s revenues by client location for the three and six months ended June 30, 2018 and 2017.

	Three Months Ended   June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
United States	$	246,831	$	192,319	$	470,514	$	369,149
United Kingdom	50,103		46,112		101,833		92,706
Switzerland	34,268		28,119		69,872		57,215
Germany	20,111		14,144		39,599		26,238
Canada	17,620		13,649		33,383		26,143
Netherlands	17,254		12,556		34,903		21,227
Russia	16,909		13,326		36,321		26,535
Other locations	42,551		28,752		83,370		54,415
Total	$	445,647	$	348,977	$	869,795	$	673,628