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Federal Income Taxes - Consolidated Income Tax Expense (Benefit) (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Current expense (benefit)	$ 0	$ 0	$ 0
Deferred expense (benefit)	8,092,000	5,636,000	0
Valuation allowance - change in estimate	0	0	(27,361,000)
Tax expense (benefit)	$ 8,092,000	$ 5,636,000	$ (27,361,000)

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

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