Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

Income Taxes - Components of Provision for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Current income tax expense, U.S. federal									$ 39,279	$ 126,585	$ 174,264
Current income tax expense, State and local									4,611	22,004	35,128
Total current income tax expense									43,890	148,589	209,392
Deferred income tax (benefit), U.S. federal									(46,345)	(51,145)	(6,718)
Deferred income tax (benefit), State and local									(7,757)	(8,426)	(1,427)
Total Deferred income tax (benefit)									(54,425)	(59,999)	(8,991)
Total provision (benefit) for income taxes	$ (14,396)	$ 3,336	$ 6,503	$ (5,655)	$ (7,740)	$ 26,747	$ 30,627	$ 39,384	$ (10,212)	$ 89,018	$ 201,247