Income Tax Expense (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Line Items]
Federal income tax, current	$ 12,541	$ 8,934	$ 9,973
State income tax, current	1,065	1,050	880
Income tax, current	13,606	9,984	10,853
Federal income tax, deferred	(1,063)	1,363	2,372
State income tax, deferred	140	99	212
Income tax, deferred	(923)	1,462	2,584
Total income tax expense	$ 12,683	$ 11,446	$ 13,437

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

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

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- Definition

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

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- Definition

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

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- Definition

Amount of other deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. For example, but not limited to, acquisition-date income tax benefits or expenses recognized from changes in the acquirer's valuation allowance for its previously existing deferred tax assets resulting from a business combination and adjustments to beginning-of-year balance of a valuation allowance because of a change in circumstance causing a change in judgment about the realizability of the related deferred tax asset in future periods.

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- Definition

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

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