Condensed Consolidating Financial Information - Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 48,810	$ 41,644
Restricted cash	63,893	63,635
Accounts receivable, net of allowance	17,161	17,113
Intercompany receivables	0	0
Inventory	7,671	7,273
Prepaid expenses and other current assets	6,526	6,745
Total current assets	144,061	136,410
Property and equipment, net	958,072	971,119
Intercompany notes receivable	0	0
Investment in subsidiaries	0	0
Intangible and other assets, net	24,616	21,736
Total assets	1,126,749	1,129,265
Current liabilities:
Current portion of long-term debt	79,215	79,215
Accounts payable	5,625	6,048
Accrued contract termination charge	21,609	21,002
Accrued expenses	27,891	20,754
Intercompany payables	0	0
Payables to affiliates	296	225
Derivative liabilities	5	1,326
Deferred revenue	31,813	31,747
Total current liabilities	166,454	160,317
Long-term debt, less current portion	441,309	434,651
Employee benefit obligations	4,452	4,389
Intercompany notes payable	0	0
Derivative liabilities	119,036	226,659
Deferred revenue	5,921	6,052
Other non-current liabilities	5,586	5,973
Total non-current liabilities	576,304	677,724
Stockholders’ equity (deficit)	383,991	291,224
Total liabilities and stockholders’ equity	1,126,749	1,129,265
Reportable Legal Entities | Parent Company
Current assets:
Cash and cash equivalents	36,359	32,864
Restricted cash	63,893	63,635
Accounts receivable, net of allowance	6,456	7,129
Intercompany receivables	994,765	979,942
Inventory	1,153	1,182
Prepaid expenses and other current assets	3,084	3,149
Total current assets	1,105,710	1,087,901
Property and equipment, net	949,887	962,756
Intercompany notes receivable	5,600	5,600
Investment in subsidiaries	(279,501)	(280,745)
Intangible and other assets, net	20,073	18,353
Total assets	1,801,769	1,793,865
Current liabilities:
Current portion of long-term debt	79,215	79,215
Accounts payable	1,906	2,257
Accrued contract termination charge	21,609	21,002
Accrued expenses	13,727	7,627
Intercompany payables	722,214	711,159
Payables to affiliates	296	225
Derivative liabilities	5	1,326
Deferred revenue	1,372	1,164
Total current liabilities	840,344	823,975
Long-term debt, less current portion	441,309	434,651
Employee benefit obligations	4,452	4,389
Intercompany notes payable	6,436	6,436
Derivative liabilities	119,036	226,659
Deferred revenue	5,546	5,625
Other non-current liabilities	655	906
Total non-current liabilities	577,434	678,666
Stockholders’ equity (deficit)	383,991	291,224
Total liabilities and stockholders’ equity	1,801,769	1,793,865
Reportable Legal Entities | Guarantor Subsidiaries
Current assets:
Cash and cash equivalents	8,649	4,942
Restricted cash	0	0
Accounts receivable, net of allowance	6,928	6,524
Intercompany receivables	767,284	755,847
Inventory	5,381	4,610
Prepaid expenses and other current assets	2,313	2,414
Total current assets	790,555	774,337
Property and equipment, net	3,638	3,855
Intercompany notes receivable	0	0
Investment in subsidiaries	87,083	84,244
Intangible and other assets, net	420	47
Total assets	881,696	862,483
Current liabilities:
Current portion of long-term debt	0	0
Accounts payable	2,758	2,736
Accrued contract termination charge	0	0
Accrued expenses	7,310	6,331
Intercompany payables	807,765	799,565
Payables to affiliates	0	0
Derivative liabilities	0	0
Deferred revenue	23,375	23,282
Total current liabilities	841,208	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	358	410
Other non-current liabilities	325	325
Total non-current liabilities	683	735
Stockholders’ equity (deficit)	39,805	29,834
Total liabilities and stockholders’ equity	881,696	862,483
Reportable Legal Entities | Non- Guarantor Subsidiaries
Current assets:
Cash and cash equivalents	3,802	3,838
Restricted cash	0	0
Accounts receivable, net of allowance	3,777	3,460
Intercompany receivables	74,538	64,477
Inventory	1,137	1,481
Prepaid expenses and other current assets	1,129	1,182
Total current assets	84,383	74,438
Property and equipment, net	4,542	4,503
Intercompany notes receivable	6,436	6,436
Investment in subsidiaries	39,372	38,637
Intangible and other assets, net	4,135	3,348
Total assets	138,868	127,362
Current liabilities:
Current portion of long-term debt	0	0
Accounts payable	961	1,055
Accrued contract termination charge	0	0
Accrued expenses	6,854	6,796
Intercompany payables	306,569	289,503
Payables to affiliates	0	0
Derivative liabilities	0	0
Deferred revenue	7,066	7,301
Total current liabilities	321,450	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	17	17
Other non-current liabilities	4,606	4,742
Total non-current liabilities	10,223	10,359
Stockholders’ equity (deficit)	(192,805)	(187,652)
Total liabilities and stockholders’ equity	138,868	127,362
Eliminations
Current assets:
Cash and cash equivalents	0	0
Restricted cash	0	0
Accounts receivable, net of allowance	0	0
Intercompany receivables	(1,836,587)	(1,800,266)
Inventory	0	0
Prepaid expenses and other current assets	0	0
Total current assets	(1,836,587)	(1,800,266)
Property and equipment, net	5	5
Intercompany notes receivable	(12,036)	(12,036)
Investment in subsidiaries	153,046	157,864
Intangible and other assets, net	(12)	(12)
Total assets	(1,695,584)	(1,654,445)
Current liabilities:
Current portion of long-term debt	0	0
Accounts payable	0	0
Accrued contract termination charge	0	0
Accrued expenses	0	0
Intercompany payables	(1,836,548)	(1,800,227)
Payables to affiliates	0	0
Derivative liabilities	0	0
Deferred revenue	0	0
Total current liabilities	(1,836,548)	(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)	153,000	157,818
Total liabilities and stockholders’ equity	$ (1,695,584)	$ (1,654,445)