Guarantor/Non Guarantor Condensed Consolidating Financial Statements (Statements of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Financial Statements, Captions [Line Items]
Revenues	$ 141,505	$ 149,332	$ 154,782	$ 144,478	$ 126,287	$ 117,281	$ 107,130	$ 95,757	$ 590,097	$ 446,455	$ 277,076
Costs and expenses:
Operating costs									429,913	330,880	203,949
Depreciation									93,554	98,777	114,312
General and administrative									74,117	69,681	61,184
Bad debt expense									271	53	156
Impairment									4,422	1,902	12,815
Gain (loss) on dispositions of property and equipment, net									(3,121)	(3,608)	(1,892)
Intercompany leasing									0	0	0
Total costs and expenses									599,156	497,685	390,524
Income (loss) from operations	(3,752)	4,338	(8,803)	(842)	(8,736)	(10,892)	(12,729)	(18,873)	(9,059)	(51,230)	(113,448)
Other income (expense):
Equity in earnings of subsidiaries									0	0	0
Interest expense, net of interest capitalized									(38,782)	(27,039)	(25,934)
Loss on extinguishment of debt									0	1,476	299
Other income (expense), net									738	424	558
Total other (expense) income									(38,044)	(28,091)	(25,675)
Income (loss) before income taxes									(47,103)	(79,321)	(139,123)
Income tax benefit (expense)	(611)	(258)	249	(1,288)	5,403	(17)	(1,135)	(48)	(1,908)	4,203	10,732
Net income (loss)	$ (14,487)	$ (5,233)	$ (18,152)	$ (11,139)	$ (12,558)	$ (17,227)	$ (20,209)	$ (25,124)	(49,011)	(75,118)	(128,391)
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Revenues									0	0	0
Costs and expenses:
Operating costs									0	0	0
Depreciation									0	0	0
General and administrative									(420)	(497)	(552)
Bad debt expense									0	0	0
Impairment									0	0	0
Gain (loss) on dispositions of property and equipment, net									0	0	0
Intercompany leasing									0	0	0
Total costs and expenses									(420)	(497)	(552)
Income (loss) from operations									420	497	552
Other income (expense):
Equity in earnings of subsidiaries									(14,635)	(381)	81,209
Interest expense, net of interest capitalized									0	0	0
Loss on extinguishment of debt										0	0
Other income (expense), net									(420)	(497)	(552)
Total other (expense) income									(15,055)	(878)	80,657
Income (loss) before income taxes									(14,635)	(381)	81,209
Income tax benefit (expense)									0	0	0
Net income (loss)									(14,635)	(381)	81,209
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Revenues									505,936	405,106	270,268
Costs and expenses:
Operating costs									365,848	298,898	194,515
Depreciation									86,799	91,817	106,193
General and administrative									49,231	45,387	38,564
Bad debt expense									271	53	156
Impairment									4,422	1,902	12,260
Gain (loss) on dispositions of property and equipment, net									(3,068)	(3,454)	(1,838)
Intercompany leasing									(4,860)	(4,860)	(4,860)
Total costs and expenses									498,643	429,743	344,990
Income (loss) from operations									7,293	(24,637)	(74,722)
Other income (expense):
Equity in earnings of subsidiaries									5,669	(3,936)	(17,835)
Interest expense, net of interest capitalized									(16)	20	(88)
Loss on extinguishment of debt										0	0
Other income (expense), net									867	896	1,430
Total other (expense) income									6,520	(3,020)	(16,493)
Income (loss) before income taxes									13,813	(27,657)	(91,215)
Income tax benefit (expense)									(4,847)	31,974	27,841
Net income (loss)									8,966	4,317	(63,374)
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Revenues									84,161	41,349	6,808
Costs and expenses:
Operating costs									64,065	31,982	9,434
Depreciation									5,628	5,718	6,869
General and administrative									2,800	1,922	1,515
Bad debt expense									0	0	0
Impairment									0	0	555
Gain (loss) on dispositions of property and equipment, net									(54)	(156)	(54)
Intercompany leasing									4,860	4,860	4,860
Total costs and expenses									77,299	44,326	23,179
Income (loss) from operations									6,862	(2,977)	(16,371)
Other income (expense):
Equity in earnings of subsidiaries									0	0	0
Interest expense, net of interest capitalized									(1)	2	(1)
Loss on extinguishment of debt										0	0
Other income (expense), net									(287)	(29)	(338)
Total other (expense) income									(288)	(27)	(339)
Income (loss) before income taxes									6,574	(3,004)	(16,710)
Income tax benefit (expense)									(905)	(932)	(1,125)
Net income (loss)									5,669	(3,936)	(17,835)
Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Revenues									0	0	0
Costs and expenses:
Operating costs									0	0	0
Depreciation									1,127	1,242	1,250
General and administrative									22,506	22,869	21,657
Bad debt expense									0	0	0
Impairment									0	0	0
Gain (loss) on dispositions of property and equipment, net									1	2	0
Intercompany leasing									0	0	0
Total costs and expenses									23,634	24,113	22,907
Income (loss) from operations									(23,634)	(24,113)	(22,907)
Other income (expense):
Equity in earnings of subsidiaries									8,966	4,317	(63,374)
Interest expense, net of interest capitalized									(38,765)	(27,061)	(25,845)
Loss on extinguishment of debt										1,476	299
Other income (expense), net									578	54	18
Total other (expense) income									(29,221)	(24,166)	(89,500)
Income (loss) before income taxes									(52,855)	(48,279)	(112,407)
Income tax benefit (expense)									3,844	(26,839)	(15,984)
Net income (loss)									$ (49,011)	$ (75,118)	$ (128,391)