Income Taxes - Components of Provision for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current
Federal	$ 10,395
State	1,787	341	49
Total current tax expense	12,182	341	49
Deferred
Federal	29,933	19,707	(104,227)
State	2,663	6,982	(28,250)
Total deferred tax expense (benefit)	32,596	26,689	(132,477)
Income tax expense (benefit)	$ 44,778	$ 27,030	$ (132,428)

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.