CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Revenue from services	$ 209,200	$ 200,717	$ 607,128	$ 615,577
Operating expenses:
Direct operating expenses	158,194	149,155	456,280	456,573
Selling, general and administrative expenses	44,407	44,086	136,387	135,004
Bad debt expense	588	502	1,503	1,312
Depreciation and amortization	2,907	2,892	9,448	8,764
Acquisition-related contingent consideration	(426)	16	74	449
Acquisition and integration costs	0	70	311	261
Restructuring costs	1,607	1,351	2,884	1,979
Legal settlement charges	0	0	1,600	0
Impairment charges	1,804	0	16,306	0
Total operating expenses	209,081	198,072	624,793	604,342
Income (loss) from operations	119	2,645	(17,665)	11,235
Other expenses (income):
Interest expense	1,398	1,512	4,258	4,225
Loss on derivative	1,284	0	1,284	0
Loss on early extinguishment of debt	94	36	508	36
Other income, net	(54)	(170)	(212)	(369)
(Loss) income before income taxes	(2,603)	1,267	(23,503)	7,343
Income tax expense	94	1,385	31,840	3,717
Consolidated net (loss) income	(2,697)	(118)	(55,343)	3,626
Less: Net income attributable to noncontrolling interest in subsidiary	431	323	1,226	886
Net (loss) income attributable to common shareholders	$ (3,128)	$ (441)	$ (56,569)	$ 2,740
Net (loss) income per share attributable to common shareholders - Basic (in dollars per share)	$ (0.09)	$ (0.01)	$ (1.58)	$ 0.08
Net (loss) income per share attributable to common shareholders - Diluted (in dollars per share)	$ (0.09)	$ (0.01)	$ (1.58)	$ 0.08
Weighted average common shares outstanding:
Basic (shares)	35,865	35,594	35,797	35,682
Diluted (shares)	35,865	35,594	35,797	35,881