SEGMENT INFORMATION (Tables)

12 Months Ended

Dec. 31, 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 were as follows:

	For the years ended December 31,
	2018		2017		2016
Total segment revenues:
North America	$	1,077,094	$	796,126	$	642,216
Europe	693,867		593,167		474,988
Russia	73,148		62,994		43,611
Total segment revenues	$	1,844,109	$	1,452,287	$	1,160,815
Segment operating profit:
North America	$	221,846	$	169,340	$	143,021
Europe	115,876		92,080		67,545
Russia	11,377		13,906		7,555
Total segment operating profit	$	349,099	$	275,326	$	218,121

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:

	For the Years Ended December 31,
	2018			2017			2016
Total segment revenues	$	1,844,109		$	1,452,287		$	1,160,815
Other income included in segment revenues	(1,197		)	(1,839		)	(683		)
Revenues	$	1,842,912		$	1,450,448		$	1,160,132
Total segment operating profit:	$	349,099		$	275,326		$	218,121
Unallocated amounts:
Other income included in segment revenues	(1,197		)	(1,839		)	(683		)
Stock-based compensation expense	(59,188		)	(52,407		)	(49,244		)
Non-corporate taxes	(9,856		)	(9,659		)	(5,909		)
Professional fees	(6,188		)	(8,032		)	(8,265		)
Depreciation and amortization	(8,057		)	(7,632		)	(8,290		)
Bank charges	(2,358		)	(1,969		)	(1,515		)
One-time charges and other acquisition-related expenses	(2,055		)	(1,741		)	(706		)
Other operating expenses	(14,436		)	(19,101		)	(9,813		)
Income from operations	245,764			172,946			133,696
Interest and other income, net	3,522			4,601			4,848
Foreign exchange gain/(loss)	487			(3,242		)	(12,078		)
Income before provision for income taxes	$	249,773		$	174,305		$	126,466

Geographical Information of Long-Lived Assets Based on Physical Location

Physical locations and values of the Company’s long-lived assets are presented below:

	As of    December 31,   2018		As of    December 31,   2017		As of December 31, 2016
Belarus	$	50,085	$	49,866	$	46,011
United States	13,101		3,371		2,618
Russia	9,902		9,617		7,203
Ukraine	8,433		6,995		5,610
India	7,019		2,698		1,650
Hungary	3,168		3,901		3,485
China	2,651		2,608		1,887
Poland	2,637		2,893		2,213
Other	5,650		4,470		2,939
Total	$	102,646	$	86,419	$	73,616

Revenues by Client Location

The table below presents the Company’s revenues by customer location for the years ended December 31, 2018, 2017 and 2016:

	For the Years Ended December 31,
	2018		2017		2016
United States	$	1,029,327	$	783,563	$	611,392
United Kingdom	200,918		188,995		177,194
Switzerland	144,398		123,281		122,919
Germany	80,787		60,158		43,621
Russia	71,181		61,222		40,944
Netherlands	70,274		51,556		17,521
Canada	69,836		57,129		59,189
Other	176,191		124,544		87,352
Revenues	$	1,842,912	$	1,450,448	$	1,160,132