Fair Value - Carrying Amounts and Estimated Fair Values of Financial Instruments (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Financial assets
Securities available for sale	$ 14,300	$ 18,516
Loans held for sale	2,571	1,210
Carrying Value [Member]
Financial assets
Cash and cash equivalents	65,147	61,436
Interest-bearing deposits in other financial institutions	1,984	1,984
Securities available for sale	14,300	18,516
Loans held for sale	2,571	1,210
Loans, net	122,940	151,160
FHLB stock	1,942	1,942
Accrued interest receivable	68	92
Yield maintenance provisions (embedded derivatives)	1,054	999
Interest rate lock commitments	45	39
Financial liabilities
Deposits	(179,578)	(217,049)
FHLB advances	(10,000)	(15,742)
Subordinated debentures	(5,155)	(5,155)
Accrued interest payable	(451)	(300)
Interest-rate swaps	(1,054)	(999)
Fair Value [Member]
Financial assets
Cash and cash equivalents	65,147	61,436
Interest-bearing deposits in other financial institutions	1,984	1,984
Securities available for sale	14,300	18,516
Loans held for sale	2,571	1,210
Loans, net	126,360	155,159
Accrued interest receivable	68	92
Yield maintenance provisions (embedded derivatives)	1,054	999
Interest rate lock commitments	45	39
Financial liabilities
Deposits	(181,694)	(219,235)
FHLB advances	(10,403)	(16,327)
Subordinated debentures	(3,071)	(2,810)
Accrued interest payable	(451)	(300)
Interest-rate swaps	(1,054)	(999)
Fair Value [Member] \| Fair Value, Inputs, Level 1 [Member]
Financial assets
Cash and cash equivalents	65,147
Interest-bearing deposits in other financial institutions	1,984
Accrued interest receivable	11
Financial liabilities
Deposits	(76,931)
Fair Value [Member] \| Fair Value Measurements Using Significant Other Observable Inputs (Level 2) [Member]
Financial assets
Securities available for sale	14,300
Loans held for sale	2,571
Accrued interest receivable	57
Yield maintenance provisions (embedded derivatives)	1,054
Interest rate lock commitments	45
Financial liabilities
Deposits	(104,763)
FHLB advances	(10,403)
Subordinated debentures	(3,071)
Accrued interest payable	(451)
Interest-rate swaps	(1,054)
Fair Value [Member] \| Fair Value Measurements Using Significant Other Observable Inputs (Level 3) [Member]
Financial assets
Loans, net	$ 126,360

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Interest rate lock commitments fair value disclosure.

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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. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

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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. This item includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Company may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months.

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Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

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Amount of subordinated debt obligations (also known as subordinated loan, subordinated bond, subordinated debenture or junior debt) which has a priority ranking after other debts in a dissolution, measured at fair value.

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