CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Revenue from services	$ 202,757	$ 204,572	$ 397,928	$ 414,860
Operating expenses:
Direct operating expenses	151,169	150,883	298,086	307,418
Selling, general and administrative expenses	45,944	45,284	91,980	90,918
Bad debt expense	645	611	915	810
Depreciation and amortization	3,557	2,963	6,541	5,872
Acquisition-related contingent consideration	253	220	500	433
Acquisition and integration costs	46	76	311	191
Restructuring costs	137	193	1,277	628
Legal settlement charges	1,600	0	1,600	0
Impairment charges	14,502	0	14,502	0
Total operating expenses	217,853	200,230	415,712	406,270
(Loss) income from operations	(15,096)	4,342	(17,784)	8,590
Other expenses (income):
Interest expense	1,438	1,447	2,860	2,713
Loss on early extinguishment of debt	54	0	414	0
Other income, net	(76)	(98)	(158)	(199)
(Loss) income before income taxes	(16,512)	2,993	(20,900)	6,076
Income tax expense	34,758	1,169	31,746	2,332
Consolidated net (loss) income	(51,270)	1,824	(52,646)	3,744
Less: Net income attributable to noncontrolling interest in subsidiary	404	285	795	563
Net (loss) income attributable to common shareholders	$ (51,674)	$ 1,539	$ (53,441)	$ 3,181
Net (loss) income per share attributable to common shareholders - Basic (in dollars per share)	$ (1.44)	$ 0.04	$ (1.49)	$ 0.09
Net (loss) income per share attributable to common shareholders - Diluted (in dollars per share)	$ (1.44)	$ 0.04	$ (1.49)	$ 0.09
Weighted average common shares outstanding:
Basic (shares)	35,824	35,652	35,763	35,727
Diluted (shares)	35,824	35,832	35,763	35,959