CONDENSED CONSOLIDATING FINANCIAL STATEMENTS - Condensed Consolidating Balance Sheets (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
Assets:
Current assets	$ 482,365	$ 506,153
Property and equipment, net	1,246,544	1,365,646
Goodwill	601,839	624,875
Deferred financing costs, net	11,798	13,897
Intercompany notes and accounts receivable and investment in subsidiaries	0	0
Other assets	64,100	76,899
TOTAL ASSETS	2,406,646	2,587,470	2,684,047
LIABILITIES AND EQUITY
Current liabilities	217,701	232,344
Long-term debt and capital leases, less current portion	758,565	763,981
Intercompany notes and accounts payable	0	0
Deferred tax liabilities	250,843	284,453
Other long-term liabilities	57,981	55,599
Equity	1,121,556	1,251,093	1,262,766	1,287,332
TOTAL LIABILITIES AND EQUITY	2,406,646	2,587,470
Parent Company
Assets:
Current assets	64,414	50,321
Property and equipment, net	0	0
Goodwill	0	0
Deferred financing costs, net	11,798	13,897
Intercompany notes and accounts receivable and investment in subsidiaries	3,227,598	3,421,607
Other assets	0	0
TOTAL ASSETS	3,303,810	3,485,825
LIABILITIES AND EQUITY
Current liabilities	11,456	26,097
Long-term debt and capital leases, less current portion	758,565	763,981
Intercompany notes and accounts payable	1,162,648	1,162,648
Deferred tax liabilities	248,414	280,828
Other long-term liabilities	1,188	1,195
Equity	1,121,539	1,251,076
TOTAL LIABILITIES AND EQUITY	3,303,810	3,485,825
Guarantor Subsidiaries
Assets:
Current assets	356,406	398,188
Property and equipment, net	1,136,242	1,244,216
Goodwill	597,458	597,457
Deferred financing costs, net	0	0
Intercompany notes and accounts receivable and investment in subsidiaries	1,420,405	1,364,174
Other assets	51,635	34,278
TOTAL ASSETS	3,562,146	3,638,313
LIABILITIES AND EQUITY
Current liabilities	179,813	182,497
Long-term debt and capital leases, less current portion	0	0
Intercompany notes and accounts payable	2,690,370	2,667,943
Deferred tax liabilities	4,570	4,643
Other long-term liabilities	56,612	54,486
Equity	630,781	728,744
TOTAL LIABILITIES AND EQUITY	3,562,146	3,638,313
Non-Guarantor Subsidiaries
Assets:
Current assets	61,545	57,644
Property and equipment, net	110,302	121,430
Goodwill	4,381	27,418
Deferred financing costs, net	0	0
Intercompany notes and accounts receivable and investment in subsidiaries	38,537	12,939
Other assets	12,465	42,621
TOTAL ASSETS	227,230	262,052
LIABILITIES AND EQUITY
Current liabilities	26,432	23,750
Long-term debt and capital leases, less current portion	0	0
Intercompany notes and accounts payable	123,954	97,050
Deferred tax liabilities	(2,141)	(1,819)
Other long-term liabilities	181	(82)
Equity	78,804	143,153
TOTAL LIABILITIES AND EQUITY	227,230	262,052
Eliminations
Assets:
Current assets	0	0
Property and equipment, net	0	0
Goodwill	0	0
Deferred financing costs, net	0	0
Intercompany notes and accounts receivable and investment in subsidiaries	(4,686,540)	(4,798,720)
Other assets	0	0
TOTAL ASSETS	(4,686,540)	(4,798,720)
LIABILITIES AND EQUITY
Current liabilities	0	0
Long-term debt and capital leases, less current portion	0	0
Intercompany notes and accounts payable	(3,976,972)	(3,927,641)
Deferred tax liabilities	0	801
Other long-term liabilities	0	0
Equity	(709,568)	(871,880)
TOTAL LIABILITIES AND EQUITY	$ (4,686,540)	$ (4,798,720)