Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Revenues	$ 123,566	$ 124,097	$ 382,289	$ 377,705
Cost of revenue	104,367	105,451	322,838	317,236
Gross profit	19,199	18,646	59,451	60,469
General and administrative expenses	12,227	14,160	40,207	39,536
Sales and marketing expenses	1,297	393	3,128	1,249
Restructuring charges	0	0	2,930	0
Gain on change in fair value of contingent consideration, net	526	268	3,972	369
Operating income	6,201	4,361	17,158	20,053
Interest expense	1,095	511	1,631	1,483
Other (expense) income	(760)	74	(1,912)	(108)
Income before income tax expense	4,346	3,924	13,615	18,462
Income tax expense	1,102	643	4,164	5,232
Net income	$ 3,244	$ 3,281	$ 9,451	$ 13,230
Basic weighted average shares outstanding (in shares)	16,536	16,750	16,555	16,736
Diluted weighted average shares outstanding (in shares)	16,628	16,896	16,647	16,856
Per common share data:
Basic earnings per share (in dollars per share)	$ 0.20	$ 0.20	$ 0.57	$ 0.79
Diluted earnings per share (in dollars per share)	$ 0.20	$ 0.19	$ 0.57	$ 0.78