Supplemental Guarantor Financial Information Supplemental Guarantor Financial Information (Income Statement) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Condensed Income Statements, Captions [Line Items]
Total revenues	$ 83,101	$ 71,598	$ 75,315	$ 65,552	$ 82,868	$ 70,714	$ 76,089	$ 81,692	$ 295,566	$ 311,363	$ 457,641
Cost of revenues (excluding depreciation and amortization expense)									193,498	191,260	290,660
Selling, general, and administrative expense									33,438	36,222	43,479
Depreciation and amortization									69,140	72,123	81,838
Impairment of long-lived assets					2,357			7,866	0	10,223	11,797
Insurance Recoveries									(2,352)	0	0
Goodwill impairment									0	92,334	139,444
Interest expense, net									43,135	38,055	34,964
Liabilities, Fair Value Adjustment									(3,402)	5,036	0
Other expense, net									(216)	2,383	2,190
Equity in net income of subsidiaries									0	0	0
Income before income tax provision (benefit)									(37,675)	(136,273)	(146,731)
Provision (benefit) for income taxes									2,784	1,865	(101)
Net income	$ (10,673)	$ (7,821)	$ (6,372)	$ (15,593)	$ (12,138)	$ (15,971)	$ (4,680)	$ (105,349)	(40,459)	(138,138)	(146,630)
Other comprehensive income									(1,078)	(2,018)	(5,057)
Comprehensive income									(41,537)	(140,156)	(151,687)
Issuers [Member]
Condensed Income Statements, Captions [Line Items]
Total revenues									0	0	0
Cost of revenues (excluding depreciation and amortization expense)									0	0	0
Selling, general, and administrative expense									1,314	3,969	2,314
Depreciation and amortization									0	0	0
Impairment of long-lived assets										0	0
Insurance Recoveries									0
Goodwill impairment										0	0
Interest expense, net									31,402	24,667	26,740
Liabilities, Fair Value Adjustment									(3,402)	5,036
Other expense, net									0	737	406
Equity in net income of subsidiaries									11,145	103,729	117,170
Income before income tax provision (benefit)									(40,459)	(138,138)	(146,630)
Provision (benefit) for income taxes									0	0	0
Net income									(40,459)	(138,138)	(146,630)
Other comprehensive income									(1,078)	(2,018)	(5,057)
Comprehensive income									(41,537)	(140,156)	(151,687)
Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Total revenues									273,649	283,846	435,954
Cost of revenues (excluding depreciation and amortization expense)									181,121	175,314	280,479
Selling, general, and administrative expense									30,504	30,574	39,113
Depreciation and amortization									65,920	69,327	78,185
Impairment of long-lived assets										10,154	11,797
Insurance Recoveries									(2,352)
Goodwill impairment										91,575	138,035
Interest expense, net									11,733	13,388	8,224
Liabilities, Fair Value Adjustment									0	0
Other expense, net									2,147	44	(272)
Equity in net income of subsidiaries									(5,112)	(3,798)	(1,086)
Income before income tax provision (benefit)									(10,312)	(102,732)	(118,521)
Provision (benefit) for income taxes									833	997	(1,351)
Net income									(11,145)	(103,729)	(117,170)
Other comprehensive income									(1,078)	(2,018)	(5,057)
Comprehensive income									(12,223)	(105,747)	(122,227)
Other Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Total revenues									28,175	38,653	42,956
Cost of revenues (excluding depreciation and amortization expense)									18,635	27,082	31,450
Selling, general, and administrative expense									1,620	1,679	2,052
Depreciation and amortization									3,220	2,796	3,653
Impairment of long-lived assets										69	0
Insurance Recoveries									0
Goodwill impairment										759	1,409
Interest expense, net									0	0	0
Liabilities, Fair Value Adjustment									0	0
Other expense, net									(2,363)	1,602	2,056
Equity in net income of subsidiaries									0	0	0
Income before income tax provision (benefit)									7,063	4,666	2,336
Provision (benefit) for income taxes									1,951	868	1,250
Net income									5,112	3,798	1,086
Other comprehensive income									(1,078)	(2,018)	(5,057)
Comprehensive income									4,034	1,780	(3,971)
Consolidation, Eliminations [Member]
Condensed Income Statements, Captions [Line Items]
Total revenues									(6,258)	(11,136)	(21,269)
Cost of revenues (excluding depreciation and amortization expense)									(6,258)	(11,136)	(21,269)
Selling, general, and administrative expense									0	0	0
Depreciation and amortization									0	0	0
Impairment of long-lived assets										0	0
Insurance Recoveries									0
Goodwill impairment										0	0
Interest expense, net									0	0	0
Liabilities, Fair Value Adjustment									0	0
Other expense, net									0	0	0
Equity in net income of subsidiaries									(6,033)	(99,931)	(116,084)
Income before income tax provision (benefit)									6,033	99,931	116,084
Provision (benefit) for income taxes									0	0	0
Net income									6,033	99,931	116,084
Other comprehensive income									2,156	4,036	10,114
Comprehensive income									$ 8,189	$ 103,967	$ 126,198