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Income Taxes - Schedule of Income Tax Expense (Benefit) (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Current federal income tax expense
Provision for doubtful federal income tax receivable
Deferred federal income tax (benefit) expense
Federal income tax benefit

Amount of current federal 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.