Other Borrowings - Additional Information (Detail) (USD $)	9 Months Ended
Sep. 30, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Unused lines of credit	$ 105,700,000	$ 105,400,000
Blanket floating lien agreement	19.00%
Borrowings of Bank	6,000,000	6,000,000
Borrowings of Bank, maturity date	Dec. 28, 2018
Weighted average rate	1.91%
Collateral pledged on borrowings including real estate loans	85,200,000	100,000,000
FHLB stock pledged as collateral	908,000	1,078,000
Note payable monthly payments	2,000
Minimum [Member]
Debt Instrument [Line Items]
Interest rate	1.78%
Maximum [Member]
Debt Instrument [Line Items]
Interest rate	2.04%
Letter of Credit [Member]
Debt Instrument [Line Items]
Borrowings of Bank	30,000,000	30,000,000
FHLB [Member]
Debt Instrument [Line Items]
Unused lines of credit	30,000,000
Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Borrowings of Bank, maturity date	Jan. 03, 2016
Interest rate	4.00%
Borrowings of Bank	$ 58,000	$ 76,000

Percentage of assets for maximum borrowing.

No definition available.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

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- Definition

Amount of the required periodic payments including both interest and principal payments.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

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- Definition

Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).

+ References

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- Definition

Amount borrowed under the credit facility as of the balance sheet date.

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-Name Regulation S-X (SX)

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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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- Definition

Carrying amount as of the balance sheet date of loans that have been pledged as collateral for borrowings. If the secured party has the right by contract or custom to sell or re-pledge the collateral, then the debtor reclassifies that asset and report that asset in its statement of financial position separately from other assets not so encumbered.

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- Definition

The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

+ References

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Weighted average interest rate of long-term debt outstanding.

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- Definition

Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

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