Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues
Services	$ 102,958	$ 105,351	$ 320,587	$ 301,166
Software and hardware	11,184	11,520	31,907	27,490
Reimbursable expenses	5,011	4,038	14,897	11,315
Total revenues	119,153	120,909	367,391	339,971
Cost of revenues (exclusive of depreciation and amortization, shown separately below)
Cost of services	67,536	66,274	210,190	193,734
Software and hardware costs	10,194	10,195	27,348	23,559
Reimbursable expenses	5,011	4,038	14,897	11,315
Total cost of revenues	82,741	80,507	252,435	228,608
Gross margin	36,412	40,402	114,956	111,363
Selling, general and administrative	24,475	23,715	76,780	72,571
Depreciation	1,212	1,148	3,619	3,322
Amortization	3,266	3,357	9,937	10,569
Acquisition costs	310	488	715	509
Adjustment to fair value of contingent consideration	(865)	99	(1,817)	273
Income from operations	8,014	11,595	25,722	24,119
Net interest expense	335	501	1,322	1,602
Net other expense	89	29	94	300
Income before income taxes	7,590	11,065	24,306	22,217
Provision for income taxes	2,045	3,691	7,540	6,780
Net income	$ 5,545	$ 7,374	$ 16,766	$ 15,437
Basic net income per share (in dollars per share)	$ 0.16	$ 0.22	$ 0.49	$ 0.46
Diluted net income per share (in dollars per share)	$ 0.16	$ 0.22	$ 0.48	$ 0.45
Shares used in computing basic net income per share (in shares)	34,128	33,498	34,040	33,292
Shares used in computing diluted net income per share (in shares)	35,077	34,187	35,012	34,163