Federal Income Taxes - Summary of Reconciliation of Rate of Taxes Payable at Federal Statutory Rate (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Tax Disclosure [Abstract]
Federal income taxes computed at the expected statutory rate	$ 77	$ 143	$ 265	$ 296
Increase (decrease) in taxes resulting from:
Nontaxable dividend and interest income	0	(7)	0	(14)
Increase in cash surrender value of life insurance - net	(54)	(52)	(107)	(109)
Valuation allowance for deferred tax assets	(5,868)	(162)	(5,868)	(31)
Other	(84)	145	(164)	(167)
Federal income tax provision per consolidated financial statements	$ (5,929)	$ (62)	$ (5,874)	$ (25)

Income Tax Reconciliation Deductions Dividends And Interest Income

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Income Tax Reconciliation Deductions Increase In Cash Surrender Value Of Life Insurance Net

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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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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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