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Income Taxes - Summary of Income Tax Expense (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Current - federal	$ 7,189	$ 6,535	$ 4,951
Current - state	128	116	137
Deferred - federal	(977)	(240)	441
Income tax expense	$ 6,340	$ 6,411	$ 5,529

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.