Supplemental Guarantor Financial Information Supplemental Guarantor Financial Information (Statement of Operations) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Condensed Income Statements, Captions [Line Items]
Revenues	$ 71,598		$ 70,714	$ 212,465	$ 228,495
Cost of revenues	45,504		40,526	138,150	132,565
Selling, general, and administrative expense	8,682		9,279	25,678	27,692
Depreciation and amortization	17,361		17,822	51,860	55,016
Insurance Recoveries	(2,352)		0	(2,352)	0
Long-lived asset impairment	0	$ 2,400	0	0	7,866
Goodwill impairment	0		0	0	92,334
Interest expense, net	11,071		9,762	31,903	27,434
Liabilities, Fair Value Adjustment	(1,300)		7,198	(4,963)	7,198
Other expense, net	(319)		1,898	(216)	2,893
Equity in net income of subsidiaries	0		0	0	0
Income (loss) before income tax provision	(7,049)		(15,771)	(27,595)	(124,503)
Provision (benefit) for income taxes	772		200	2,191	1,497
Net income	(7,821)		(15,971)	(29,786)	(126,000)
Foreign currency translation adjustment	(326)		(577)	(644)	(1,496)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	(8,147)		(16,548)	(30,430)	(127,496)
Parent Company [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	0		0	0	0
Cost of revenues	0		0	0	0
Selling, general, and administrative expense	263		1,736	2,247	3,047
Depreciation and amortization	0		0	0	0
Insurance Recoveries	0			0
Long-lived asset impairment					0
Goodwill impairment					0
Interest expense, net	7,826		6,485	23,675	19,447
Liabilities, Fair Value Adjustment	(1,300)		7,198	(4,963)	7,198
Other expense, net	0		1,583	0	1,583
Equity in net income of subsidiaries	1,032		(1,031)	8,827	94,725
Income (loss) before income tax provision	(7,821)		(15,971)	(29,786)	(126,000)
Provision (benefit) for income taxes	0		0	0	0
Net income	(7,821)		(15,971)	(29,786)	(126,000)
Foreign currency translation adjustment	(326)		(577)	(644)	(1,496)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	(8,147)		(16,548)	(30,430)	(127,496)
Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	65,278		64,496	196,376	205,989
Cost of revenues	42,031		36,814	128,936	119,705
Selling, general, and administrative expense	7,961		7,206	22,264	23,380
Depreciation and amortization	16,522		17,123	49,439	52,878
Insurance Recoveries	(2,352)			(2,352)
Long-lived asset impairment					7,797
Goodwill impairment					91,574
Interest expense, net	3,245		3,277	8,228	7,987
Liabilities, Fair Value Adjustment	0		0	0	0
Other expense, net	(446)		62	156	167
Equity in net income of subsidiaries	(976)		(1,108)	(2,004)	(3,869)
Income (loss) before income tax provision	(707)		1,122	(8,291)	(93,630)
Provision (benefit) for income taxes	325		91	536	1,095
Net income	(1,032)		1,031	(8,827)	(94,725)
Foreign currency translation adjustment	(326)		(577)	(644)	(1,496)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	(1,358)		454	(9,471)	(96,221)
Other Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	7,574		8,404	20,276	31,698
Cost of revenues	4,727		5,898	13,401	22,052
Selling, general, and administrative expense	458		337	1,167	1,265
Depreciation and amortization	839		699	2,421	2,138
Insurance Recoveries	0			0
Long-lived asset impairment					69
Goodwill impairment					760
Interest expense, net	0		0	0	0
Liabilities, Fair Value Adjustment	0		0	0	0
Other expense, net	127		253	(372)	1,143
Equity in net income of subsidiaries	0		0	0	0
Income (loss) before income tax provision	1,423		1,217	3,659	4,271
Provision (benefit) for income taxes	447		109	1,655	402
Net income	976		1,108	2,004	3,869
Foreign currency translation adjustment	(326)		(577)	(644)	(1,496)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	650		531	1,360	2,373
Consolidation, Eliminations [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	(1,254)		(2,186)	(4,187)	(9,192)
Cost of revenues	(1,254)		(2,186)	(4,187)	(9,192)
Selling, general, and administrative expense	0		0	0	0
Depreciation and amortization	0		0	0	0
Insurance Recoveries	0			0
Long-lived asset impairment					0
Goodwill impairment					0
Interest expense, net	0		0	0	0
Liabilities, Fair Value Adjustment	0		0	0	0
Other expense, net	0		0	0	0
Equity in net income of subsidiaries	(56)		2,139	(6,823)	(90,856)
Income (loss) before income tax provision	56		(2,139)	6,823	90,856
Provision (benefit) for income taxes	0		0	0	0
Net income	56		(2,139)	6,823	90,856
Foreign currency translation adjustment	652		1,154	1,288	2,992
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ 708		$ (985)	$ 8,111	$ 93,848