Fair Value Measurements (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Financial Instruments - Assets, Carrying Amount
Loans	$ 119,449	$ 123,414
Financial Instruments - Liabilities, Carrying Amount
Time deposits	116,977	117,167
Securities sold under agreements to repurchase	5,084	6,280
Subordinated debentures	12,372	12,372
Financial Instruments - Assets, Fair Value
Loans	119,557	123,553
Financial Instruments - Liabilities, Fair Value
Time deposits	117,492	117,723
Securities sold under agreements to repurchase	5,084	6,280
Subordinated debentures	12,372	12,372
Level 2
Financial Instruments - Liabilities, Fair Value
Time deposits	117,492	117,723
Securities sold under agreements to repurchase	5,084	6,280
Subordinated debentures	12,372	12,372
Level 3
Financial Instruments - Assets, Fair Value
Loans	$ 119,557	$ 123,553

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Time deposits, Fair Value Disclosure

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Including the current and noncurrent portions, carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Junior Subordinated Notes, which have a lower priority than senior instruments.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. The amount of securities that an institution sells and agrees to repurchase (seller-borrower) at a specified date for a specified price, net of any reductions or offsets. Most repurchase agreements involve obligations of the federal government or its agencies, but other financial instruments, such as commercial paper, banker's acceptances, and negotiable certificates of deposit (CDs), are sometimes used in repurchase agreements. A repurchase agreement is similar to the seller-borrower's borrowing funds equal to the sales price of the related securities with the securities as collateral. Maturities of such agreements are flexible and generally vary from one day to 270 days.

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The carrying value as of the balance sheet date of securities that an institution sells and agrees to repurchase (the identical or substantially the same securities) as a seller-borrower at a specified date for a specified price, also known as a repurchase agreement, or repo. Most repos involve obligations of the federal government or its agencies, but other financial instruments, such as commercial paper, banker's acceptances, and negotiable certificates of deposit, are sometimes used in repos.

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Amount of deposits that cannot be withdrawn before a set date without penalty or for which notice of withdrawal is required. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts.

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