Income Taxes - Reconciliation of Provision (Benefit) for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Tax at statutory rate	35.00%	35.00%	35.00%
State taxes, net of federal benefit	2.00%	7.00%	48.00%
Affiliated stock loss			25.00%
Contingency reserve			215.00%
Change in valuation allowance			(1343.00%)
Other, net			1.00%
Income tax expense (benefit)	37.00%	42.00%	(1019.00%)
Tax at statutory rate	$ 41,968	$ 22,645	$ 4,547
State taxes, net of federal benefit	2,893	4,793	6,222
Affiliated stock loss			3,283
Contingency reserve			27,911
Change in valuation allowance	(264)	(242)	(174,527)
Other, net	181	(166)	136
Income tax expense (benefit)	$ 44,778	$ 27,030	$ (132,428)

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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