Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues		$ 208,738	$ 196,445	$ 405,054	$ 369,473
Costs and expenses:
Costs of revenues		136,425	124,851	264,601	235,886
Selling, general and administrative expenses		42,721	42,590	84,873	83,118
Depreciation and amortization	[1]	13,729	14,858	28,577	29,200
Total costs and expenses		192,875	182,299	378,051	348,204
Income from operations		15,863	14,146	27,003	21,269
Interest and other expenses, net:
Interest expense, net		9,948	7,904	17,952	15,481
Loss on early extinguishment of debt		18,619		18,619
Other expense, net			191		191
Total interest and other expenses, net		28,567	8,095	36,571	15,672
Income (loss) before income taxes		(12,704)	6,051	(9,568)	5,597
Provision (benefit) for income taxes		(4,841)	2,519	(3,729)	2,354
Net income (loss)		(7,863)	3,532	(5,839)	3,243
Comprehensive Income (Loss):
Net income (loss)		(7,863)	3,532	(5,839)	3,243
Foreign currency translation adjustments, net of tax		1,814	1,796	(4,063)	971
Total comprehensive income (loss)		$ (6,049)	$ 5,328	$ (9,902)	$ 4,214
Net income (loss) per share:
Basic (in Dollars per share)		$ (0.19)	$ 0.09	$ (0.14)	$ 0.09
Diluted (in Dollars per share)		$ (0.19)	$ 0.09	$ (0.14)	$ 0.08
Weighted average number of common shares outstanding:
Basic (in Shares)		41,015	38,452	40,713	37,764
Diluted (in Shares)		41,015	40,940	40,713	40,522

[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.