CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue:
Revenue, net (includes $1.5 million with related parties for the three months ended March 31, 2018)	$ 163,077	$ 0
Service revenue, net (includes $4.0 million with related parties for the three months ended March 31, 2017)	0	93,781
Reimbursed out-of-pocket revenue (includes $0.7 million with related parties for the three months ended March 31, 2017)	0	12,830
Total revenue	163,077	106,611
Operating expenses:
Direct service costs, excluding depreciation and amortization	60,341	51,105
Reimbursed out-of-pocket expenses	56,913	12,830
Total direct costs	117,254	63,935
Selling, general and administrative	15,999	15,154
Depreciation	2,314	2,130
Amortization	7,391	9,448
Total operating expenses	142,958	90,667
Income from operations	20,119	15,944
Other expense, net:
Miscellaneous expense, net	(153)	(372)
Interest expense, net	(2,309)	(1,794)
Total other expense, net	(2,462)	(2,166)
Income before income taxes	17,657	13,778
Income tax provision	3,106	5,331
Net income	$ 14,551	$ 8,447
Net income per share attributable to common shareholders:
Basic	$ 0.41	$ 0.21
Diluted	$ 0.40	$ 0.20
Weighted average common shares outstanding:
Basic	35,486	40,669
Diluted	36,449	41,508