Quarterly Information of Effects of Revision on Consolidated Statements of Operations (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2011		Sep. 30, 2011		Jun. 30, 2011		Mar. 31, 2011		Dec. 31, 2010		Sep. 30, 2010		Jun. 30, 2010		Mar. 31, 2010		Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Interest expense, net of interest capitalized							$ (100,625)		$ (99,936)		$ (89,082)		$ (90,661)		$ (91,528)		$ (382,416)	$ (371,207)	$ (309,948)
Total other expense							(71,124)		(89,795)		(95,323)		(89,953)		(11,909)		(324,207)	(286,980)	(336,026)
Net income	36,562	[1],[2]	398,958	[1],[2]	93,491	[1],[2]	78,410	[1],[2]	31,900	[1],[2]	350,179	[1],[2]	53,731	[1],[2]	79,843	[1],[2]	607,421	515,653	152,485
Earnings (Loss) per Share:
Basic	$ 0.17	[1]	$ 1.84	[1]	$ 0.43	[1]	$ 0.36	[1]	$ 0.15	[1]	$ 1.63	[1]	$ 0.25	[1]	$ 0.37	[1]	$ 2.80	$ 2.40	$ 0.71
Diluted	$ 0.17	[1]	$ 1.82	[1]	$ 0.43	[1]	$ 0.36	[1]	$ 0.15	[1]	$ 1.61	[1]	$ 0.25	[1]	$ 0.37	[1]	$ 2.77	$ 2.37	$ 0.71
As Previously Reported
Interest expense, net of interest capitalized							(87,483)		(89,129)		(82,494)		(83,846)		(83,924)			(339,393)	(300,012)
Total other expense							(57,982)		(78,988)		(88,735)		(83,138)		(4,305)			(255,166)	(326,090)
Net income							91,552		42,707		356,767		60,546		87,447			547,467	162,421
Earnings (Loss) per Share:
Basic							$ 0.42		$ 0.20		$ 1.66		$ 0.28		$ 0.41			$ 2.55	$ 0.76
Diluted							$ 0.42		$ 0.20		$ 1.64		$ 0.28		$ 0.40			$ 2.51	$ 0.75
Adjustment
Interest expense, net of interest capitalized							(13,142)		(10,807)		(6,588)		(6,815)		(7,604)			(31,814)	(9,936)
Total other expense							(13,142)		(10,807)		(6,588)		(6,815)		(7,604)			(31,814)	(9,936)
Net income							$ (13,142)		$ (10,807)		$ (6,588)		$ (6,815)		$ (7,604)			$ (31,814)	$ (9,936)
Earnings (Loss) per Share:
Basic							$ (0.06)		$ (0.05)		$ (0.03)		$ (0.03)		$ (0.04)			$ (0.15)	$ (0.05)
Diluted							$ (0.06)		$ (0.05)		$ (0.03)		$ (0.03)		$ (0.04)			$ (0.15)	$ (0.05)

[1] Amounts for 2010 and amounts for the first quarter of 2011 include a revision for the correction of an error in the manner in which we were amortizing certain guarantee fees. Refer to the tables below which present the effects of the revision on the Company's Consolidated Statements of Operations for these respective periods.

[2] The first quarter of 2010 included a one-time gain of approximately $85.6 million, net of costs and payments to insurers, related to the settlement of our case against Rolls Royce.