Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Revenue from services	$ 196,583	$ 185,964
Operating expenses:
Direct operating expenses	145,537	138,927
Selling, general and administrative expenses	42,933	41,166
Bad debt expense	249	91
Depreciation	1,005	960
Amortization	1,407	982
Acquisition-related contingent consideration	287	0
Acquisition and integration costs	0	118
Total operating expenses	191,418	182,244
Income from operations	5,165	3,720
Other expenses (income):
Interest expense	1,635	1,737
Gain on derivative liability	(16,436)	(2,147)
Other (income) expense, net	(17)	43
Income before income taxes	19,983	4,087
Income tax expense	797	1,037
Consolidated net income	19,186	3,050
Less: Net income attributable to noncontrolling interest in subsidiary	164	116
Net income attributable to common shareholders	$ 19,022	$ 2,934
Net income per share attributable to common shareholders - Basic
Net income per share attributable to common shareholders - Basic (in dollars per share)	$ 0.60	$ 0.09
Net income per share attributable to common shareholders - Diluted
Net income per share attributable to common shareholders - Diluted (in dollars per share)	$ 0.09	$ 0.05
Weighted average common shares outstanding:
Basic (shares)	31,956	31,294
Diluted (shares)	36,180	35,454