Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Revenues	$ 196,445		$ 156,148		$ 369,473		$ 304,851
Costs and expenses:
Costs of revenues	124,851		102,118		235,886		199,502
Selling, general and administrative expenses	42,590		34,076		83,118		67,333
Depreciation and amortization	14,858	[1],[2]	15,822	[1],[2]	29,200	[1],[2]	32,148	[1],[2]
Total costs and expenses	182,299		152,016		348,204		298,983
Income from operations	14,146		4,132		21,269		5,868
Interest and other expenses, net:
Interest expense, net	7,904		7,541		15,481		15,119
Other expense, net	191		205		191		205
Gain on interest rate swap			(46)				(94)
Total interest and other expenses, net	8,095		7,700		15,672		15,230
Income (loss) before income taxes	6,051		(3,568)		5,597		(9,362)
Provision (benefit) for income taxes	2,519		(785)		2,354		(2,987)
Net income (loss)	3,532		(2,783)		3,243		(6,375)
Comprehensive Income (Loss):
Net income (loss)	3,532		(2,783)		3,243		(6,375)
Foreign currency translation adjustments, net of tax	1,796		(5,731)		971		(9,982)
Total comprehensive income (loss)	$ 5,328		$ (8,514)		$ 4,214		$ (16,357)
Net income (loss) per share:
Basic (in Dollars per share)	$ 0.09		$ (0.08)		$ 0.09		$ (0.18)
Diluted (in Dollars per share)	$ 0.09		$ (0.08)		$ 0.08		$ (0.18)
Weighted average number of common shares outstanding:
Basic (in Shares)	38,451,848		34,910,937		37,763,812		34,685,892
Diluted (in Shares)	40,939,576		34,910,937		40,522,432		34,685,892

[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.