Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Revenues		$ 226,503	$ 196,316
Costs and expenses:
Costs of revenues		149,126	128,176
Selling, general and administrative expenses		47,339	42,152
Depreciation and amortization	[1]	16,636	14,848
Total costs and expenses		213,101	185,176
Income from operations		13,402	11,140
Interest and other expenses, net:
Interest expense, net		8,399	8,004
Total interest and other expenses, net		8,399	8,004
Income before income taxes		5,003	3,136
Provision for income taxes		1,743	1,112
Net income		3,260	2,024
Comprehensive Income (Loss):
Net income		3,260	2,024
Foreign currency translation adjustments, net of tax		1,237	(5,877)
Total comprehensive income (loss)		$ 4,497	$ (3,853)
Net income per share:
Basic (in dollars per share)		$ 0.08	$ 0.05
Diluted (in dollars per share)		$ 0.08	$ 0.05
Weighted average number of common shares outstanding:
Basic (in shares)		40,805	40,418
Diluted (in shares)		42,362	42,680

[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.