CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues	$ 608,088	$ 485,323	$ 1,190,128	$ 915,368
Cost of services	406,002	326,789	800,260	620,959
Gross profit	202,086	158,534	389,868	294,409
Selling, general and administrative expenses	141,350	118,867	281,231	224,802
Amortization of intangible assets	10,032	6,957	20,176	11,826
Operating income	50,704	32,710	88,461	57,781
Interest expense, net	(7,959)	(4,736)	(16,984)	(7,803)
Write-off of loan costs	0	3,751	0	3,751
Income before income taxes	42,745	24,223	71,477	46,227
Provision for income taxes	16,732	9,888	28,116	18,869
Income from continuing operations	26,013	14,335	43,361	27,358
Gain on sale of discontinued operations, net of income taxes	0	0	0	25,703
Income (loss) from discontinued operations, net of income taxes	(9)	(83)	44	326
Net income	$ 26,004	$ 14,252	$ 43,405	$ 53,387
Basic earnings per common share:
Income from continuing operations	$ 0.49	$ 0.28	$ 0.81	$ 0.53
Discontinued operations	0.00	(0.01)	0.00	0.50
Net income	0.49	0.27	0.81	1.03
Diluted earnings per common share:
Income from continuing operations	0.48	0.27	0.81	0.52
Discontinued operations	0.00	0.00	0.00	0.50
Net income	$ 0.48	$ 0.27	$ 0.81	$ 1.02
Number of shares and share equivalents used to calculate earnings per share:
Basic	53,422	51,978	53,284	51,749
Diluted	53,911	52,633	53,783	52,435
Reconciliation of net income to comprehensive income:
Net income	$ 26,004	$ 14,252	$ 43,405	$ 53,387
Changes in fair value of derivative, net of tax	0	75	0	122
Foreign currency translation adjustment	(1,083)	828	260	(2,896)
Comprehensive income	$ 24,921	$ 15,155	$ 43,665	$ 50,613