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]
Revenue from services	$ 200,717	$ 228,488	$ 615,577	$ 645,374
Operating expenses:
Direct operating expenses	149,155	168,008	456,573	475,091
Selling, general and administrative expenses	44,086	47,346	135,004	141,182
Bad debt expense	502	433	1,312	1,082
Depreciation and amortization	2,892	2,849	8,764	7,325
Acquisition-related contingent consideration	16	(605)	449	(54)
Acquisition and integration costs	70	1,366	261	1,953
Restructuring costs	1,351	724	1,979	724
Total operating expenses	198,072	220,121	604,342	627,303
Income from operations	2,645	8,367	11,235	18,071
Other expenses (income):
Interest expense	1,512	1,221	4,225	2,975
Gain on derivative liability	0	0	0	(1,581)
Loss on early extinguishment of debt	36	0	36	4,969
Other income, net	(170)	(57)	(369)	(116)
Income before income taxes	1,267	7,203	7,343	11,824
Income tax expense	1,385	159	3,717	1,278
Consolidated net (loss) income	(118)	7,044	3,626	10,546
Less: Net income attributable to noncontrolling interest in subsidiary	323	321	886	983
Net (loss) income attributable to common shareholders	$ (441)	$ 6,723	$ 2,740	$ 9,563
Net (loss) income per share attributable to common shareholders - Basic (in dollars per share)	$ (0.01)	$ 0.19	$ 0.08	$ 0.28
Net (loss) income per share attributable to common shareholders - Diluted (in dollars per share)	$ (0.01)	$ 0.19	$ 0.08	$ 0.24
Weighted average common shares outstanding:
Basic (shares)	35,594	35,748	35,682	34,768
Diluted (shares)	35,594	36,036	35,881	36,179