Consolidated Statements of Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues	$ 819,567	$ 775,615	$ 616,016
Costs and expenses:
Costs of revenues	536,494	497,038	405,329
Selling, general and administrative expenses	166,650	171,197	133,870
Depreciation and amortization	55,691	60,280	62,748
Total costs and expenses	758,835	728,515	601,947
Income from operations	60,732	47,100	14,069
Interest and other expenses, net:
Interest expense, net	33,918	31,977	29,531
Loss on early extinguishment of debt	18,619
Other expense, net		194	211
Gain on interest rate swap			(101)
Total interest and other expenses, net	52,537	32,171	29,641
Income (loss) before income taxes	8,195	14,929	(15,572)
Provision (benefit) for income taxes	2,604	4,435	(5,356)
Net income (loss)	5,591	10,494	(10,216)
Comprehensive Income (Loss):
Net income (loss)	5,591	10,494	(10,216)
Foreign currency translation adjustments, net of tax	(11,627)	(8,439)	(9,120)
Total comprehensive income (loss)	$ (6,036)	$ 2,055	$ (19,336)
Net income (loss) per share:
Basic (in Dollars per share)	$ 0.14	$ 0.27	$ (0.29)
Diluted (in Dollars per share)	$ 0.13	$ 0.25	$ (0.29)
Weighted average number of common shares outstanding:
Basic (in Shares)	41,111	38,656	35,315
Diluted (in Shares)	43,044	41,232	35,315