CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Revenue from services	$ 216,779	$ 202,757	$ 426,843	$ 397,928
Operating expenses:
Direct operating expenses	166,045	151,169	326,506	298,086
Selling, general and administrative expenses	42,254	45,944	88,135	91,980
Bad debt expense	898	645	1,437	915
Depreciation and amortization	3,929	3,557	7,225	6,541
Acquisition and integration-related costs	0	299	77	811
Restructuring costs	2,330	137	2,894	1,277
Legal settlement charges	0	1,600	0	1,600
Impairment charges	15,011	14,502	15,011	14,502
Total operating expenses	230,467	217,853	441,285	415,712
Loss from operations	(13,688)	(15,096)	(14,442)	(17,784)
Other expenses (income):
Interest expense	744	1,438	1,611	2,860
Loss on early extinguishment of debt	0	54	0	414
Other income, net	(5)	(76)	(36)	(158)
Loss before income taxes	(14,427)	(16,512)	(16,017)	(20,900)
Income tax (benefit) expense	(379)	34,758	(201)	31,746
Consolidated net loss	(14,048)	(51,270)	(15,816)	(52,646)
Less: Net income attributable to noncontrolling interest in subsidiary	103	404	424	795
Net loss attributable to common shareholders	$ (14,151)	$ (51,674)	$ (16,240)	$ (53,441)
Net loss per share attributable to common shareholders - Basic and Diluted (in dollars per share)	$ (0.39)	$ (1.44)	$ (0.45)	$ (1.49)
Weighted average common shares outstanding:
Basic and Diluted (in shares)	36,123	35,824	35,998	35,763