CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues	$ 468,618	$ 407,864	$ 907,892	$ 786,908
Cost of services	315,891	286,532	617,577	555,465
Gross profit	152,727	121,332	290,315	231,443
Selling, general and administrative expenses	107,923	84,282	212,057	166,159
Amortization of intangible assets	6,156	5,275	12,328	10,654
Operating income	38,648	31,775	65,930	54,630
Interest expense, net	(3,103)	(4,081)	(6,431)	(9,177)
Write-off of loan costs	0	(14,958)	0	(14,958)
Income before income taxes	35,545	12,736	59,499	30,495
Provision for income taxes	14,846	5,493	24,752	13,036
Income from continuing operations	20,699	7,243	34,747	17,459
Gain on sale of discontinued operations, net of income taxes	0	0	0	14,412
Income (loss) from discontinued operations, net of income taxes	90	96	(41)	81
Net income	20,789	7,339	34,706	31,952
Basic earnings per common share:
Income from continuing operations	$ 0.38	$ 0.14	$ 0.64	$ 0.33
Discontinued operations	$ 0.00	$ 0.00	$ 0.00	$ 0.27
Net income	$ 0.38	$ 0.14	$ 0.64	$ 0.60
Diluted earnings per common share:
Income from continuing operations	$ 0.38	$ 0.13	$ 0.63	$ 0.32
Discontinued operations	$ 0.00	$ 0.01	$ 0.00	$ 0.27
Net income	$ 0.38	$ 0.14	$ 0.63	$ 0.59
Number of shares and share equivalents used to calculate earnings per share:
Basic	54,372	53,378	54,239	53,213
Diluted	55,173	54,327	55,098	54,222
Reconciliation of net income to comprehensive income:
Net income	20,789	7,339	34,706	31,952
Changes in fair value of derivatives, net of tax	7	76	51	143
Foreign currency translation adjustment, net of tax	(160)	403	(204)	(856)
Comprehensive income	$ 20,636	$ 7,818	$ 34,553	$ 31,239