OPERATING SEGMENTS (Tables)

3 Months Ended

Mar. 31, 2016

Segment Reporting [Abstract]

Revenues from External Customers and Segment Operating Profit Before Unallocated Expenses

Revenues from external customers and segment operating profit, before unallocated expenses, for the North America, Europe, Russia and Other reportable segments for the three months ended March 31, 2016 and 2015, were as follows:

	Three Months Ended   March 31,
	2016		2015
Total segment revenues:
North America	$	147,490	$	100,269
Europe	107,843		91,152
Russia	9,481		7,513
Other	—		1,260
Total segment revenues	$	264,814	$	200,194
Segment operating profit:
North America	$	30,655	$	24,068
Europe	16,832		15,340
Russia	1,160		(271		)
Other	—		(457		)
Total segment operating profit	$	48,647	$	38,680

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

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

	Three Months Ended   March 31,
	2016			2015
Total segment revenues	$	264,814		$	200,194
Other income	(332		)	(149		)
Revenues	$	264,482		$	200,045
Total segment operating profit:	$	48,647		$	38,680
Unallocated amounts:
Other income	(332		)	(149		)
Stock-based compensation expense	(10,964		)	(9,134		)
Non-corporate taxes	(1,080		)	(825		)
Professional fees	(1,726		)	(1,822		)
Depreciation and amortization	(1,691		)	(1,329		)
Bank charges	(341		)	(367		)
Other corporate expenses	(2,182		)	(2,234		)
Income from operations	30,331			22,820
Interest and other income, net	1,211			1,158
Foreign exchange gain/(loss)	(1,290		)	(5,754		)
Income before provision for income taxes	$	30,252		$	18,224

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,   2016		As of    December 31,   2015
Belarus	$	44,724	$	44,879
Ukraine	5,091		4,487
Hungary	3,369		2,485
Russia	3,099		2,084
United States	2,314		1,969
India	1,333		1,099
Poland	1,464		1,088
Other	2,900		2,408
Total	$	64,294	$	60,499

Revenues by Client Location

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

	Three Months Ended   March 31,
	2016		2015
United States	$	135,558	$	92,182
United Kingdom	42,990		38,565
Switzerland	30,765		26,351
Canada	15,701		12,485
Russia	8,952		7,259
Germany	8,706		6,498
Hong Kong	5,754		5,210
Netherlands	2,547		2,046
Sweden	4,060		2,013
Belgium	2,124		1,525
Kazakhstan	742		1,259
Ireland	1,184		1,187
Other locations	2,953		1,608
Reimbursable expenses and other revenues	2,446		1,857
Revenues	$	264,482	$	200,045