Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Revenues	$ 204,078		$ 152,354		$ 573,551		$ 457,205
Costs and expenses:
Costs of revenues	130,597		100,831		366,483		300,333
Selling, general and administrative expenses	43,534		31,620		126,652		98,953
Depreciation and amortization	15,705	[1],[2]	15,910	[1],[2]	44,905	[1],[2]	48,058	[1],[2]
Total costs and expenses	189,836		148,361		538,040		447,344
Income from operations	14,242		3,993		35,511		9,861
Interest and other expenses, net:
Interest expense, net	8,361		7,320		23,842		22,439
Other (income) expense, net	(6)		3		185		208
Gain on interest rate swap			(7)				(101)
Total interest and other expenses, net	8,355		7,316		24,027		22,546
Income (loss) before income taxes	5,887		(3,323)		11,484		(12,685)
Provision (benefit) for income taxes	2,472		(1,072)		4,826		(4,059)
Net income (loss)	3,415		(2,251)		6,658		(8,626)
Comprehensive Income (Loss):
Net income (loss)	3,415		(2,251)		6,658		(8,626)
Foreign currency translation adjustments, net of tax	(4,956)		3,046		(3,985)		(6,936)
Total comprehensive income (loss)	$ (1,541)		$ 795		$ 2,673		$ (15,562)
Net income (loss) per share:
Basic (in Dollars per share)	$ 0.09		$ (0.06)		$ 0.17		$ (0.25)
Diluted (in Dollars per share)	$ 0.08		$ (0.06)		$ 0.16		$ (0.25)
Weighted average number of common shares outstanding:
Basic (in Shares)	39,251,221		35,560,227		38,258,941		34,977,335
Diluted (in Shares)	41,647,190		35,560,227		40,896,677		34,977,335

[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.

[2] Long-lived assets are noncurrent assets excluding deferred tax assets and deferred financing costs.