Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2015		Sep. 30, 2014	Sep. 30, 2015		Sep. 30, 2014
Revenues	$ 206,033		$ 204,078	$ 611,087		$ 573,551
Costs and expenses:
Costs of revenues	134,446		130,597	399,047		366,483
Selling, general and administrative expenses	40,455		43,534	125,328		126,652
Depreciation and amortization	12,997	[1]	15,705	41,574	[1]	44,905
Total costs and expenses	187,898		189,836	565,949		538,040
Income from operations	18,135		14,242	45,138		35,511
Interest and other expenses, net:
Interest expense, net	8,000		8,361	25,952		23,842
Loss on early extinguishment of debt				18,619
Other expense, net			(6)			185
Total interest and other expenses, net	8,000		8,355	44,571		24,027
Income before income taxes	10,135		5,887	567		11,484
Provision (benefit) for income taxes	2,980		2,472	(749)		4,826
Net income	7,155		3,415	1,316		6,658
Comprehensive Income (Loss):
Net income	7,155		3,415	1,316		6,658
Foreign currency translation adjustments, net of tax	(4,607)		(4,956)	(8,670)		(3,985)
Total comprehensive income (loss)	$ 2,548		$ (1,541)	$ (7,354)		$ 2,673
Net income per share:
Basic (in Dollars per share)	$ 0.17		$ 0.09	$ 0.03		$ 0.17
Diluted (in Dollars per share)	$ 0.17		$ 0.08	$ 0.03		$ 0.16
Weighted average number of common shares outstanding:
Basic (in Shares)	41,384		39,251	40,936		38,259
Diluted (in Shares)	43,158		41,647	42,981		40,897

[1] For segment purposes, the Company defines "segment profit" as earnings before interest expenses, income taxes, depreciation and amortization, share-based compensation expenses, acquisition related transaction costs and other expenses. A consolidated reconciliation from segment profit to income from operations is included below.