Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue
Revenue before reimbursements (net revenue)	$ 187,588	$ 159,800	$ 530,718	$ 452,020
Reimbursements	4,753	4,665	13,970	13,740
Total revenue	192,341	164,465	544,688	465,760
Operating expenses
Salaries and employee benefits	133,933	108,546	373,021	309,159
General and administrative expenses	33,072	37,232	105,532	111,454
Goodwill and Intangible Asset Impairment	0	0	0	39,158
Reimbursed expenses	4,753	4,665	13,970	13,740
Total operating expenses	171,758	150,443	492,523	473,511
Operating income (loss)	20,583	14,022	52,165	(7,751)
Non-operating income (expense)
Interest, net	259	94	496	195
Other, net	2,345	147	1,849	(2,773)
Net non-operating expense	2,604	241	2,345	(2,578)
Income (loss) before income taxes	23,187	14,263	54,510	(10,329)
Provision for (benefit from) income taxes	(6,718)	(6,092)	(16,410)	902
Net income (loss)	16,469	8,171	38,100	(9,427)
Other comprehensive income (loss), net of tax
Foreign currency translation adjustment	(881)	995	(3,107)	5,779
Net unrealized gain on available-for-sale investments	0	624	0	1,858
Other comprehensive income (loss), net of tax	(881)	1,619	(3,107)	7,637
Comprehensive income (loss)	$ 15,588	$ 9,790	$ 34,993	$ (1,790)
Basic weighted average common shares outstanding (in shares)	18,954	18,781	18,905	18,720
Diluted weighted average common shares outstanding (in shares)	19,401	19,016	19,444	18,720
Basic net income per common share (in USD per share)	$ 0.87	$ 0.44	$ 2.02	$ (0.50)
Diluted net income per common share (in USD per share)	0.85	0.43	1.96	(0.50)
Cash dividends paid per share (in USD per share)	$ 0.13	$ 0.13	$ 0.39	$ 0.39