Securities - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013 Securities	Dec. 31, 2012 Securities	Dec. 31, 2011
Schedule of Trading Securities and Other Trading Assets [Line Items]
Sale of securities in portfolio	$ 8,753
Impairment charges on securities available-for-sale	1,240	528	368
Proceed from sale of security available for sale	789	9,997	1,298
Pretax gains on proceed from sale of security	0	0	24
Pretax losses on proceed from sale of security	0	0	(3)
Tax applicable on gross proceeds from sales of securities available for sale			8
Carrying value of investment securities which are pledged	216,051	195,142
Held to maturity securities in unrealized loss position
Number of securities in unrealized loss position	215	88
Pooled Trust Preferred Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Impairment charges on securities available-for-sale	1,240	528	368
Percentage of preferred security investment	12.40%	5.00%	3.20%
Income tax benefits to impairment charges	$ 513	$ 217	$ 151

Available For Sale Securities Income Tax Expense On Gain Or Loss On Sale

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Carrying value of investment securities pledged.

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Gain Loss On Sale Of Available For Sale Securities

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Gain on Sale of Available For Sale Securities

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This item represents the excess of amortized cost basis over fair value of securities in a loss position and which are categorized as held-to-maturity.

+ References

No definition available.

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Number of securities in unrealized loss position.

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- Definition

Percentage Of Preferred Security Investment

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- Definition

The cash inflow associated with the sale of trust preferred securities portfolio.

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The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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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 nondeductible impairment loss.

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The cash inflow associated with the sale or maturity (principal being due) of securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities.

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