Condensed Consolidated Balance Sheet (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents - unrestricted	$ 24,230	$ 44,388	$ 12,122	$ 124,398
Cash and cash equivalents - restricted	1,150	1,150
Trade receivables, net	60,369	41,939
Deferred income taxes	546	8,641
Other current assets	53,167	48,538
Total current assets	139,462	144,656
Property and equipment, net of accumulated depreciation	2,172,788	2,209,127
Notes receivable, net of current portion	137,542	142,567
Long-term deferred financing costs	12,572	15,947
Other long-term assets	46,736	50,713
Long-term assets of discontinued operations	346	390
Total assets	2,509,446	2,563,400
Current liabilities:
Current portion of long-term debt and capital lease obligations	99,537	755
Accounts payable and accrued liabilities	196,245	168,975
Current liabilities of discontinued operations	217	186
Total current liabilities	295,999	169,916
Long-term debt and capital lease obligations, net of current portion	1,048,924	1,073,070
Deferred income taxes	98,345	108,219
Other long-term liabilities	172,052	166,209
Long-term liabilities of discontinued operations	451	451
Commitments and contingencies
Stockholders' equity:
Preferred stock	0	0
Common stock	453	484
Additional paid-in capital	975,117	929,904
Treasury stock	(4,599)	(4,599)
Retained earnings	(41,265)	155,777
Accumulated other comprehensive loss	(36,031)	(36,031)
Total stockholders' equity	893,675	1,045,535
Total liabilities and stockholders' equity	2,509,446	2,563,400
Issuer [Member]
Current assets:
Cash and cash equivalents - unrestricted	17,841	37,562	8,378	117,913
Cash and cash equivalents - restricted	1,150	1,150
Deferred income taxes	2,389	1,195
Other current assets	2,781	2,710
Intercompany receivables, net	1,726,957	1,745,197
Total current assets	1,751,118	1,787,814
Property and equipment, net of accumulated depreciation	48,022	43,733
Long-term deferred financing costs	12,572	15,947
Other long-term assets	658,400	658,167
Total assets	2,470,112	2,505,661
Current liabilities:
Current portion of long-term debt and capital lease obligations	98,825
Accounts payable and accrued liabilities	52,225	17,934
Total current liabilities	151,050	17,934
Long-term debt and capital lease obligations, net of current portion	1,047,801	1,071,426
Deferred income taxes	(31,439)	(36,586)
Other long-term liabilities	84,031	82,358
Commitments and contingencies
Stockholders' equity:
Preferred stock	0	0
Common stock	453	484
Additional paid-in capital	975,117	929,904
Treasury stock	(4,599)	(4,599)
Retained earnings	283,729	480,771
Accumulated other comprehensive loss	(36,031)	(36,031)
Total stockholders' equity	1,218,669	1,370,529
Total liabilities and stockholders' equity	2,470,112	2,505,661
Guarantor [Member]
Current assets:
Cash and cash equivalents - unrestricted	6,365	6,826	3,744	6,485
Trade receivables, net	60,338	41,939
Deferred income taxes	(1,976)	7,423
Other current assets	50,236	45,954
Total current assets	114,963	102,142
Property and equipment, net of accumulated depreciation	2,114,129	2,165,394
Notes receivable, net of current portion	137,542	142,567
Other long-term assets	352,751	359,297
Total assets	2,719,385	2,769,400
Current liabilities:
Current portion of long-term debt and capital lease obligations	712	755
Accounts payable and accrued liabilities	143,880	151,458
Intercompany payables, net	1,886,481	1,958,653
Total current liabilities	2,031,073	2,110,866
Long-term debt and capital lease obligations, net of current portion	1,123	1,644
Deferred income taxes	129,432	144,886
Other long-term liabilities	87,733	83,560
Commitments and contingencies
Stockholders' equity:
Preferred stock
Common stock	2,388	2,388
Additional paid-in capital	1,081,067	1,081,063
Retained earnings	(613,431)	(655,007)
Total stockholders' equity	470,024	428,444
Total liabilities and stockholders' equity	2,719,385	2,769,400
Non-Guarantor [Member]
Current assets:
Cash and cash equivalents - unrestricted	24
Trade receivables, net	31
Deferred income taxes	133	23
Other current assets	276
Intercompany receivables, net	249,370	302,368
Total current assets	249,834	302,391
Property and equipment, net of accumulated depreciation	10,637
Long-term assets of discontinued operations	346	390
Total assets	260,817	302,781
Current liabilities:
Accounts payable and accrued liabilities	557
Intercompany payables, net	89,846	88,912
Current liabilities of discontinued operations	217	186
Total current liabilities	90,620	89,098
Deferred income taxes	352	(81)
Other long-term liabilities	(3)
Long-term liabilities of discontinued operations	451	451
Commitments and contingencies
Stockholders' equity:
Preferred stock
Common stock	1	1
Additional paid-in capital	(40,129)	(40,127)
Retained earnings	209,525	253,439
Total stockholders' equity	169,397	213,313
Total liabilities and stockholders' equity	260,817	302,781
Eliminations [Member]
Current assets:
Cash and cash equivalents - unrestricted
Other current assets	(126)	(126)
Intercompany receivables, net	(1,976,327)	(2,047,565)
Total current assets	(1,976,453)	(2,047,691)
Other long-term assets	(964,415)	(966,751)
Total assets	(2,940,868)	(3,014,442)
Current liabilities:
Accounts payable and accrued liabilities	(417)	(417)
Intercompany payables, net	(1,976,327)	(2,047,565)
Total current liabilities	(1,976,744)	(2,047,982)
Other long-term liabilities	291	291
Commitments and contingencies
Stockholders' equity:
Preferred stock
Common stock	(2,389)	(2,389)
Additional paid-in capital	(1,040,938)	(1,040,936)
Retained earnings	78,912	76,574
Total stockholders' equity	(964,415)	(966,751)
Total liabilities and stockholders' equity	$ (2,940,868)	$ (3,014,442)