Condensed Consolidating Financial Information - Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 25,085		$ 15,212
Restricted cash	60,898		60,278
Accounts receivable, net of allowance	22,419		19,327
Intercompany receivables	0		0
Inventory	14,831		14,274
Prepaid expenses and other current assets	20,319		13,410
Total current assets	143,552		122,501
Property and equipment, net	843,952		882,695
Operating lease right of use assets, net	14,198		0
Intercompany notes receivable	0		0
Investment in subsidiaries	0		0
Intangible and other assets, net	35,361		40,286
Total assets	1,037,063		1,045,482
Current liabilities:
Current portion of long-term debt	98,829		96,249
Accounts payable	7,083		6,995
Accrued expenses	29,688		23,085
Intercompany payables	0		0
Payables to affiliates	2,356		656
Derivative liabilities	288		757
Deferred revenue	32,713		31,938
Total current liabilities	170,957		159,680
Long-term debt, less current portion	392,706		367,202
Operating lease liabilities	13,185		0
Employee benefit obligations	4,580		4,489
Intercompany notes payable	0		0
Derivative liabilities	54,453		146,108
Deferred revenue	5,395		5,692
Other non-current liabilities	2,901		3,366
Total non-current liabilities	473,220		526,857
Stockholders’ equity (deficit)	392,886	$ 385,375	358,945	$ 381,343	$ 383,991	$ 291,224
Total liabilities and stockholders’ equity	1,037,063		1,045,482
Reportable Legal Entities | Parent Company
Current assets:
Cash and cash equivalents	20,551		11,312
Restricted cash	60,898		60,278
Accounts receivable, net of allowance	8,637		7,138
Intercompany receivables	1,069,458		1,047,320
Inventory	5,802		6,747
Prepaid expenses and other current assets	11,053		7,765
Total current assets	1,176,399		1,140,560
Property and equipment, net	812,875		850,790
Operating lease right of use assets, net	12,202
Intercompany notes receivable	5,674		5,600
Investment in subsidiaries	(258,372)		(255,187)
Intangible and other assets, net	30,522		36,275
Total assets	1,779,300		1,778,038
Current liabilities:
Current portion of long-term debt	98,829		96,249
Accounts payable	2,175		2,420
Accrued expenses	13,873		8,904
Intercompany payables	798,331		778,340
Payables to affiliates	2,356		656
Derivative liabilities	288		757
Deferred revenue	1,658		1,699
Total current liabilities	917,510		889,025
Long-term debt, less current portion	392,706		367,202
Operating lease liabilities	11,821
Employee benefit obligations	4,580		4,489
Intercompany notes payable	0		6,436
Derivative liabilities	54,453		146,108
Deferred revenue	5,196		5,339
Other non-current liabilities	148		494
Total non-current liabilities	468,904		530,068
Stockholders’ equity (deficit)	392,886		358,945
Total liabilities and stockholders’ equity	1,779,300		1,778,038
Reportable Legal Entities | Guarantor Subsidiaries
Current assets:
Cash and cash equivalents	814		2,126
Restricted cash	0		0
Accounts receivable, net of allowance	8,890		7,826
Intercompany receivables	842,249		824,920
Inventory	7,143		6,149
Prepaid expenses and other current assets	6,289		2,987
Total current assets	865,385		844,008
Property and equipment, net	929		1,242
Operating lease right of use assets, net	226
Intercompany notes receivable	0		0
Investment in subsidiaries	46,117		42,481
Intangible and other assets, net	255		324
Total assets	912,912		888,055
Current liabilities:
Current portion of long-term debt	0		0
Accounts payable	3,645		3,378
Accrued expenses	7,553		6,747
Intercompany payables	838,834		832,284
Payables to affiliates	0		0
Derivative liabilities	0		0
Deferred revenue	23,040		23,943
Total current liabilities	873,072		866,352
Long-term debt, less current portion	0		0
Operating lease liabilities	192
Employee benefit obligations	0		0
Intercompany notes payable	0		0
Derivative liabilities	0		0
Deferred revenue	180		335
Other non-current liabilities	322		323
Total non-current liabilities	694		658
Stockholders’ equity (deficit)	39,146		21,045
Total liabilities and stockholders’ equity	912,912		888,055
Reportable Legal Entities | Non- Guarantor Subsidiaries
Current assets:
Cash and cash equivalents	3,720		1,774
Restricted cash	0		0
Accounts receivable, net of allowance	4,892		4,363
Intercompany receivables	79,453		105,819
Inventory	1,886		1,378
Prepaid expenses and other current assets	2,977		2,658
Total current assets	92,928		115,992
Property and equipment, net	30,144		30,658
Operating lease right of use assets, net	1,770
Intercompany notes receivable	0		6,436
Investment in subsidiaries	53,118		50,220
Intangible and other assets, net	4,596		3,698
Total assets	182,556		207,004
Current liabilities:
Current portion of long-term debt	0		0
Accounts payable	1,263		1,197
Accrued expenses	8,262		7,434
Intercompany payables	353,936		367,396
Payables to affiliates	0		0
Derivative liabilities	0		0
Deferred revenue	8,015		6,296
Total current liabilities	371,476		382,323
Long-term debt, less current portion	0		0
Operating lease liabilities	1,172
Employee benefit obligations	0		0
Intercompany notes payable	5,674		5,600
Derivative liabilities	0		0
Deferred revenue	19		18
Other non-current liabilities	2,431		2,549
Total non-current liabilities	9,296		8,167
Stockholders’ equity (deficit)	(198,216)		(183,486)
Total liabilities and stockholders’ equity	182,556		207,004
Eliminations
Current assets:
Cash and cash equivalents	0		0
Restricted cash	0		0
Accounts receivable, net of allowance	0		0
Intercompany receivables	(1,991,160)		(1,978,059)
Inventory	0		0
Prepaid expenses and other current assets	0		0
Total current assets	(1,991,160)		(1,978,059)
Property and equipment, net	4		5
Operating lease right of use assets, net	0
Intercompany notes receivable	(5,674)		(12,036)
Investment in subsidiaries	159,137		162,486
Intangible and other assets, net	(12)		(11)
Total assets	(1,837,705)		(1,827,615)
Current liabilities:
Current portion of long-term debt	0		0
Accounts payable	0		0
Accrued expenses	0		0
Intercompany payables	(1,991,101)		(1,978,020)
Payables to affiliates	0		0
Derivative liabilities	0		0
Deferred revenue	0		0
Total current liabilities	(1,991,101)		(1,978,020)
Long-term debt, less current portion	0		0
Operating lease liabilities	0
Employee benefit obligations	0		0
Intercompany notes payable	(5,674)		(12,036)
Derivative liabilities	0		0
Deferred revenue	0		0
Other non-current liabilities	0		0
Total non-current liabilities	(5,674)		(12,036)
Stockholders’ equity (deficit)	159,070		162,441
Total liabilities and stockholders’ equity	$ (1,837,705)		$ (1,827,615)