CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Revenues	$ 389,193		$ 156,760
Cost of services	275,919		104,011
Gross profit	113,274		52,749
Selling, general and administrative expenses	84,161		42,745
Amortization of intangible assets	5,379		634
Operating income	23,734		9,370
Interest expense, net	(5,331)		(701)
Income before income taxes	18,403		8,669
Provision for income taxes	7,793		3,622
Income from continuing operations	10,610		5,047
Gain on sale of discontinued operations, net of income taxes	14,412		0
Income (loss) from discontinued operations, net of income taxes	(409)		336
Basic earnings per common share:
Income from continuing operations	$ 0.20		$ 0.14
Income from discontinued operations	$ 0.26		$ 0.00
Net Income	$ 0.46		$ 0.14
Diluted earnings per common share:
Income from continuing operations	$ 0.20		$ 0.13
Income from discontinued operations	$ 0.26		$ 0.01
Net Income	$ 0.46		$ 0.14
Number of shares and share equivalents used to calculate earnings per share:
Basic	53,046		37,269
Diluted	54,036		38,154
Reconciliation of net income to comprehensive income:
Net income	24,613		5,383
Changes in fair value of derivatives, net of tax of $28 and $83 for the three months ended March 31, 2013 and 2012, respectively (1)	67	[1]	0	[1]
Foreign currency translation adjustment	(1,259)		1,097
Comprehensive income	$ 23,421		$ 6,480

[1] See Note 5, Derivative Instruments, for additional information