UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Net revenue	$ 175,789	$ 218,106	$ 344,373	$ 435,916
Cost of revenue (excluding depreciation expense)	115,832	150,495	229,368	303,430
Gross profit	59,957	67,611	115,005	132,486
Other operating expenses	38,861	42,293	78,160	86,612
Bad debt expense	0	6,117	0	13,160
General and administrative expenses	10,931	9,654	21,600	18,920
Restructuring, acquisition, integration, and other expenses, net	2,024	4,147	3,906	7,370
Change in fair value of equity linked liabilities	3,064	0	(375)	0
Depreciation and amortization expense	6,366	7,065	12,852	14,230
Interest expense	13,805	12,630	27,200	25,290
Loss on extinguishment of debt	0	13,453	0	13,453
(Gain) loss on dispositions	(13)	685	(318)	685
Loss from continuing operations, before income taxes	(15,081)	(28,433)	(28,020)	(47,234)
Income tax expense	43	718	91	1,337
Loss from continuing operations, net of income taxes	(15,124)	(29,151)	(28,111)	(48,571)
Loss from discontinued operations, net of income taxes	(15)	(373)	(45)	(672)
Net loss	(15,139)	(29,524)	(28,156)	(49,243)
Dividends on preferred stock	(2,756)	(2,478)	(5,413)	(4,866)
Loss attributable to common stockholders	$ (17,895)	$ (32,002)	$ (33,569)	$ (54,109)
Loss per common share:
Loss from continuing operations, basic and diluted (in dollars per share)	$ (0.14)	$ (0.26)	$ (0.26)	$ (0.44)
Loss from discontinued operations, basic and diluted (in dollars per share)	0.00	0.00	0.00	(0.01)
Loss per common share, basic and diluted (in dollars per share)	$ (0.14)	$ (0.26)	$ (0.26)	$ (0.45)
Weighted average common shares outstanding, basic and diluted (in shares)	128,038	121,189	127,906	119,993