CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenue:
Service revenue, net (includes $4.0 million and $7.8 million with related parties for the three months ended March 31, 2017 and 2016, respectively)	$ 93,781	$ 87,800
Reimbursed out-of-pocket revenue (includes $0.7 million and $1.2 million with related parties for the three months ended March 31, 2017 and 2016, respectively)	12,830	11,786
Total revenue	106,611	99,586
Operating expenses:
Direct costs, excluding depreciation and amortization	51,105	46,981
Reimbursed out-of-pocket expenses (includes $0.7 million and $1.2 million with related parties for the three months ended March 31, 2017 and 2016, respectively)	12,830	11,786
Selling, general and administrative	15,154	13,509
Depreciation	2,130	1,773
Amortization	9,448	12,668
Total operating expenses	90,667	86,717
Income from operations	15,944	12,869
Other expense, net:
Miscellaneous expense, net	(372)	(935)
Interest expense, net	(1,794)	(5,973)
Total other expense, net	(2,166)	(6,908)
Income before income taxes	13,778	5,961
Income tax provision	5,331	2,513
Net income	$ 8,447	$ 3,448
Net income per share attributable to common shareholders:
Basic	$ 0.21	$ 0.11
Diluted	$ 0.20	$ 0.11
Weighted average common shares outstanding:
Basic	40,669	32,625
Diluted	41,508	32,625