Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Revenue from services	$ 214,988	$ 195,692	$ 611,014	$ 574,273
Operating expenses:
Direct operating expenses	156,778	144,206	446,912	427,387
Selling, general and administrative expenses	45,922	39,227	133,530	121,284
Bad debt expense	19	549	496	771
Depreciation	995	953	3,059	2,902
Amortization	1,097	982	3,910	2,947
Loss on sale of business	0	2,184	0	2,184
Acquisition-related contingent consideration	237	0	707	0
Acquisition and integration costs	0	584	0	742
Restructuring costs	611	140	611	1,147
Impairment charges	0	0	24,311	0
Total operating expenses	205,659	188,825	613,536	559,364
Income (loss) from operations	9,329	6,867	(2,522)	14,909
Other expenses (income):
Interest expense	1,435	1,654	4,678	5,163
(Gain) loss on derivative liability	(7,105)	2,894	(19,970)	385
Loss on early extinguishment of debt	0	0	1,568	0
Other income, net	(92)	(100)	(143)	(30)
Income before income taxes	15,091	2,419	11,345	9,391
Income tax expense (benefit)	802	(2,732)	(5,035)	(1,490)
Consolidated net income	14,289	5,151	16,380	10,881
Less: Net income attributable to noncontrolling interest in subsidiary	223	142	529	365
Net income attributable to common shareholders	$ 14,066	$ 5,009	$ 15,851	$ 10,516
Net income per share attributable to common shareholders - Basic
Net income per share attributable to common shareholders - Basic (in dollars per share)	$ 0.44	$ 0.16	$ 0.49	$ 0.33
Net income (loss) per share attributable to common shareholders - Diluted
Net income (loss) per share attributable to common shareholders - Diluted (in dollars per share)	$ 0.22	$ 0.16	$ (0.04)	$ 0.33
Weighted average common shares outstanding:
Basic (shares)	32,221	31,541	32,088	31,412
Diluted (shares)	36,255	32,168	36,215	32,048