CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME
Revenues	$ 149,066	$ 147,465	$ 295,887	$ 298,530
Costs and expenses
Cost of revenues (exclusive of depreciation and amortization)	111,724	108,378	222,822	222,193
Operating expenses	19,479	18,958	38,463	36,446
Depreciation	1,945	1,820	3,513	3,564
Amortization	2,285	2,346	4,555	4,667
Total costs and expenses	135,433	131,502	269,353	266,870
Operating income	13,633	15,963	26,534	31,660
Other expenses
Interest expense, net of interest income	2,733	4,063	5,896	8,547
Total other expenses	2,733	4,063	5,896	8,547
Income from operations before tax	10,900	11,900	20,638	23,113
Income tax provision	4,124	4,816	7,726	8,901
Net income	6,776	7,084	12,912	14,212
Foreign currency translation	(97)	(217)	(512)	(72)
Comprehensive income	$ 6,679	$ 6,867	$ 12,400	$ 14,140
Earnings per share
Basic (in dollars per share)	$ 0.10	$ 0.11	$ 0.19	$ 0.22
Diluted (in dollars per share)	$ 0.10	$ 0.11	$ 0.19	$ 0.21
Weighted average common shares outstanding
Basic (in shares)	66,116	65,774	66,401	65,470
Diluted (in shares)	66,993	67,383	67,425	66,786