SEGMENTS INFORMATION (Tables)

3 Months Ended

Mar. 31, 2017

Segment Reporting [Abstract]

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

Revenues from external customers and operating profit/(loss), before unallocated expenses, for the North America, Europe, and Russia reportable segments for the three months ended March 31, 2017 and 2016, were as follows:

	Three Months Ended   March 31,
	2017		2016
Segment revenues:
North America	$	178,303	$	147,490
Europe	132,707		107,843
Russia	13,693		9,481
Total segment revenues	$	324,703	$	264,814
Segment operating profit:
North America	$	37,092	$	30,655
Europe	19,811		16,832
Russia	3,549		1,160
Total segment operating profit	$	60,452	$	48,647

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   March 31,
	2017			2016
Total segment revenues	$	324,703		$	264,814
Other revenues	(52		)	(332		)
Revenues	$	324,651		$	264,482
Total segment operating profit:	$	60,452		$	48,647
Unallocated amounts:
Other revenues	(52		)	(332		)
Stock-based compensation expense	(15,776		)	(10,964		)
Non-corporate taxes	(3,451		)	(1,080		)
Professional fees	(2,344		)	(1,726		)
Depreciation and amortization	(1,975		)	(1,691		)
Bank charges	(397		)	(341		)
One-time charges	(568		)	—
Other corporate expenses	(4,923		)	(2,182		)
Income from operations	30,966			30,331
Interest and other income, net	584			1,211
Foreign exchange loss	(2,955		)	(1,290		)
Income before provision for income taxes	$	28,595		$	30,252

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    March 31,   2017		As of    December 31,   2016
Belarus	$	47,124	$	46,011
Russia	7,853		7,203
Ukraine	5,847		5,610
Hungary	3,384		3,485
United States	3,013		2,618
Poland	2,498		2,213
China	1,785		1,887
India	1,530		1,650
Other	2,928		2,939
Total	$	75,962	$	73,616

Revenues by Client Location

Information about the Company’s revenues by client location, including reimbursable expenses of $3,925 and $2,446 for the three months ended March 31, 2017 and 2016, respectively, is as follows:

	Three Months Ended   March 31,
	2017		2016
United States	$	176,830	$	136,639
United Kingdom	46,594		43,560
Switzerland	29,096		30,852
Russia	13,209		8,965
Canada	12,494		15,846
Germany	12,094		8,739
Netherlands	8,671		2,647
Sweden	7,466		4,128
Hong Kong	4,777		5,944
United Arab Emirates	2,048		—
China	1,584		294
Ireland	1,389		1,186
Italy	1,280		668
Denmark	1,253		410
Other locations	5,866		4,604
Revenues	$	324,651	$	264,482