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Allowance for Loan Losses - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014 Contract	Mar. 31, 2013 Contract	Dec. 31, 2013
Receivables [Abstract]
Troubled debt restructurings (TDRs)	$ 2,200,000		$ 1,900,000
TDRs performing under the restructured terms	986,000	829,000
Pre-modification recorded investment totaled	283,000
Post-modification recorded investment totaled	344,000
Loans modified under TDRs	1	0
Troubled debt restructuring loan subsequent default	$ 0	$ 0
Troubled debt restructuring loan subsequent default period	90 days

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Financing receivable modification as troubled debt restructuring that subsequently defaulted.

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Performing troubled debt restructurings.

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Number of financing receivables that have been modified by troubled debt restructurings.

+ References

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

-Publisher FASB

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-Topic 310

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Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

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Pre-modification amount of investment in financing receivables modified by troubled debt restructurings.

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The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

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Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default.

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