Condensed Consolidating Financial Information - Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 20,462	$ 41,644
Restricted cash	52,934	63,635
Accounts receivable, net of allowance	20,471	17,113
Intercompany receivables	0	0
Inventory	13,067	7,273
Prepaid expenses and other current assets	8,800	6,745
Total current assets	115,734	136,410
Property and equipment, net	903,990	971,119
Intercompany notes receivable	0	0
Investment in subsidiaries	0	0
Intangible and other assets, net	38,097	21,736
Total assets	1,057,821	1,129,265
Current liabilities:
Current portion of long-term debt	87,732	79,215
Accounts payable	9,525	6,048
Accrued contract termination charge	0	21,002
Accrued expenses	28,999	20,754
Intercompany payables	0	0
Payables to affiliates	645	225
Derivative liabilities	617	1,326
Deferred revenue	35,031	31,747
Total current liabilities	162,549	160,317
Long-term debt, less current portion	407,615	434,651
Employee benefit obligations	4,450	4,389
Intercompany notes payable	0	0
Derivative liabilities	81,424	226,659
Deferred revenue	5,758	6,052
Other non-current liabilities	3,925	5,973
Total non-current liabilities	503,172	677,724
Stockholders’ equity (deficit)	392,100	291,224
Total liabilities and stockholders’ equity	1,057,821	1,129,265
Reportable Legal Entities | Parent Company
Current assets:
Cash and cash equivalents	5,812	32,864
Restricted cash	52,934	63,635
Accounts receivable, net of allowance	6,883	7,129
Intercompany receivables	1,029,012	979,942
Inventory	6,507	1,182
Prepaid expenses and other current assets	6,174	3,149
Total current assets	1,107,322	1,087,901
Property and equipment, net	871,946	962,756
Intercompany notes receivable	5,600	5,600
Investment in subsidiaries	(253,026)	(280,745)
Intangible and other assets, net	34,830	18,353
Total assets	1,766,672	1,793,865
Current liabilities:
Current portion of long-term debt	87,732	79,215
Accounts payable	4,788	2,257
Accrued contract termination charge		21,002
Accrued expenses	16,512	7,627
Intercompany payables	756,701	711,159
Payables to affiliates	645	225
Derivative liabilities	617	1,326
Deferred revenue	1,711	1,164
Total current liabilities	868,706	823,975
Long-term debt, less current portion	407,615	434,651
Employee benefit obligations	4,450	4,389
Intercompany notes payable	6,436	6,436
Derivative liabilities	81,424	226,659
Deferred revenue	5,392	5,625
Other non-current liabilities	549	906
Total non-current liabilities	505,866	678,666
Stockholders’ equity (deficit)	392,100	291,224
Total liabilities and stockholders’ equity	1,766,672	1,793,865
Reportable Legal Entities | Guarantor Subsidiaries
Current assets:
Cash and cash equivalents	11,454	4,942
Restricted cash	0	0
Accounts receivable, net of allowance	9,245	6,524
Intercompany receivables	803,742	755,847
Inventory	5,231	4,610
Prepaid expenses and other current assets	532	2,414
Total current assets	830,204	774,337
Property and equipment, net	996	3,855
Intercompany notes receivable	0	0
Investment in subsidiaries	40,156	84,244
Intangible and other assets, net	366	47
Total assets	871,722	862,483
Current liabilities:
Current portion of long-term debt	0	0
Accounts payable	3,869	2,736
Accrued contract termination charge		0
Accrued expenses	7,318	6,331
Intercompany payables	822,739	799,565
Payables to affiliates	0	0
Derivative liabilities	0	0
Deferred revenue	26,179	23,282
Total current liabilities	860,105	831,914
Long-term debt, less current portion	0	0
Employee benefit obligations	0	0
Intercompany notes payable	0	0
Derivative liabilities	0	0
Deferred revenue	348	410
Other non-current liabilities	324	325
Total non-current liabilities	672	735
Stockholders’ equity (deficit)	10,945	29,834
Total liabilities and stockholders’ equity	871,722	862,483
Reportable Legal Entities | Non- Guarantor Subsidiaries
Current assets:
Cash and cash equivalents	3,196	3,838
Restricted cash	0	0
Accounts receivable, net of allowance	4,343	3,460
Intercompany receivables	95,461	64,477
Inventory	1,329	1,481
Prepaid expenses and other current assets	2,094	1,182
Total current assets	106,423	74,438
Property and equipment, net	31,043	4,503
Intercompany notes receivable	6,436	6,436
Investment in subsidiaries	49,034	38,637
Intangible and other assets, net	2,913	3,348
Total assets	195,849	127,362
Current liabilities:
Current portion of long-term debt	0	0
Accounts payable	868	1,055
Accrued contract termination charge		0
Accrued expenses	5,169	6,796
Intercompany payables	348,736	289,503
Payables to affiliates	0	0
Derivative liabilities	0	0
Deferred revenue	7,141	7,301
Total current liabilities	361,914	304,655
Long-term debt, less current portion	0	0
Employee benefit obligations	0	0
Intercompany notes payable	5,600	5,600
Derivative liabilities	0	0
Deferred revenue	18	17
Other non-current liabilities	3,052	4,742
Total non-current liabilities	8,670	10,359
Stockholders’ equity (deficit)	(174,735)	(187,652)
Total liabilities and stockholders’ equity	195,849	127,362
Eliminations
Current assets:
Cash and cash equivalents	0	0
Restricted cash	0	0
Accounts receivable, net of allowance	0	0
Intercompany receivables	(1,928,215)	(1,800,266)
Inventory	0	0
Prepaid expenses and other current assets	0	0
Total current assets	(1,928,215)	(1,800,266)
Property and equipment, net	5	5
Intercompany notes receivable	(12,036)	(12,036)
Investment in subsidiaries	163,836	157,864
Intangible and other assets, net	(12)	(12)
Total assets	(1,776,422)	(1,654,445)
Current liabilities:
Current portion of long-term debt	0	0
Accounts payable	0	0
Accrued contract termination charge		0
Accrued expenses	0	0
Intercompany payables	(1,928,176)	(1,800,227)
Payables to affiliates	0	0
Derivative liabilities	0	0
Deferred revenue	0	0
Total current liabilities	(1,928,176)	(1,800,227)
Long-term debt, less current portion	0	0
Employee benefit obligations	0	0
Intercompany notes payable	(12,036)	(12,036)
Derivative liabilities	0	0
Deferred revenue	0	0
Other non-current liabilities	0	0
Total non-current liabilities	(12,036)	(12,036)
Stockholders’ equity (deficit)	163,790	157,818
Total liabilities and stockholders’ equity	$ (1,776,422)	$ (1,654,445)