Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Revenue	$ 126,690	$ 122,394	$ 380,572	$ 314,708
Cost of revenue, excluding amortization	91,771	93,475	281,813	236,122
Operating expenses	28,455	24,781	81,262	81,672
Intangible amortization expense	2,721	3,604	9,399	8,858
Operating income (loss)	3,743	534	8,098	(11,944)
Interest expense, net	6,240	4,829	16,974	12,352
Loss on extinguishment of debt	166	0	11,595	0
Other non-operating loss (income)	9	(246)	(123)	(375)
Loss before income taxes	(2,672)	(4,049)	(20,348)	(23,921)
Income tax (benefit) expense, net	(686)	1,980	(3,569)	5,039
Net loss	$ (1,986)	$ (6,029)	$ (16,779)	$ (28,960)
Weighted average common shares outstanding
Basic	49,833	49,771	49,814	48,627
Diluted	49,833	49,771	49,814	48,627
Loss per share
Basic	$ (0.04)	$ (0.12)	$ (0.34)	$ (0.60)
Diluted	$ (0.04)	$ (0.12)	$ (0.34)	$ (0.60)