Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Revenue from services	$ 207,573	$ 196,583
Cost of services	154,298	145,537
Gross profit	53,275	51,046
Operating expenses:
Selling, general and administrative expenses	47,236	42,933
Bad debt expense	323	249
Depreciation and amortization	2,191	2,412
Acquisition-related contingent consideration	270	287
Total operating expenses	50,020	45,881
Income from operations	3,255	5,165
Other expenses (income):
Interest expense	1,219	1,635
Gain on derivative liability	(1,581)	(16,436)
Loss on early extinguishment of debt	4,969	0
Other income, net	0	(17)
(Loss) income before income taxes	(1,352)	19,983
Income tax expense	366	797
Consolidated net (loss) income	(1,718)	19,186
Less: Net income attributable to noncontrolling interest in subsidiary	292	164
Net (loss) income attributable to common shareholders	$ (2,010)	$ 19,022
Net (loss) income per share attributable to common shareholders - Basic
Net (loss) income per share attributable to common shareholders - Basic (in dollars per share)	$ (0.06)	$ 0.60
Net (loss) income per share attributable to common shareholders - Diluted
Net (loss) income per share attributable to common shareholders - Diluted (in dollars per share)	$ (0.08)	$ 0.09
Weighted average common shares outstanding:
Basic (shares)	32,872	31,956
Diluted (shares)	36,480	36,180