Fair Value - Carrying and Fair Value of Financial Instruments (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	$ 101,211	$ 85,298
Investment securities held to maturity	725	903
Loans held for sale	1,831	6,544
Loans receivable	577,003	554,575
Federal Home Loan Bank stock	9,888	9,888
Accrued interest receivable	2,471	2,631
Deposits	609,012	627,224
Advances from the Federal Home Loan Bank	59,477	53,297
Advances by borrowers for taxes and insurance	1,718	2,635
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	17,185	58,379
Investment securities available for sale	0	0
Investment securities held to maturity	0	0
Loans held for sale	0	0
Loans receivable	0	0
Federal Home Loan Bank stock	0	0
Accrued interest receivable	0	0
Deposits	0	0
Advances from the Federal Home Loan Bank	0	0
Repurchase agreements	0	0
Subordinated debentures	0	0
Advances by borrowers for taxes and insurance	0	0
Accrued interest payable	0	0
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Investment securities available for sale	101,168	85,254
Investment securities held to maturity	760	957
Loans held for sale	1,903	6,759
Loans receivable	0	0
Federal Home Loan Bank stock	0	0
Accrued interest receivable	0	0
Deposits	580,194	622,186
Advances from the Federal Home Loan Bank	61,249	56,310
Repurchase agreements	6,931	5,923
Subordinated debentures	0	0
Advances by borrowers for taxes and insurance	0	0
Accrued interest payable	0	0
Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Investment securities available for sale	43	44
Investment securities held to maturity	0	0
Loans held for sale	0	0
Loans receivable	581,629	544,655
Federal Home Loan Bank stock	9,888	9,888
Accrued interest receivable	2,471	2,631
Deposits	0	0
Advances from the Federal Home Loan Bank	0	0
Repurchase agreements	0	0
Subordinated debentures	4,863	4,976
Advances by borrowers for taxes and insurance	1,718	2,635
Accrued interest payable	1,823	1,692
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	17,185	58,379
Investment securities available for sale	101,211	85,298
Investment securities held to maturity	725	903
Loans held for sale	1,831	6,544
Loans receivable	577,003	554,575
Federal Home Loan Bank stock	9,888	9,888
Accrued interest receivable	2,471	2,631
Deposits	609,012	627,224
Advances from the Federal Home Loan Bank	59,477	53,297
Repurchase agreements	6,931	5,923
Subordinated debentures	5,000	5,000
Advances by borrowers for taxes and insurance	1,718	2,635
Accrued interest payable	1,823	1,692
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	17,185	58,379
Investment securities available for sale	101,211	85,298
Investment securities held to maturity	760	957
Loans held for sale	1,903	6,759
Loans receivable	581,629	544,655
Federal Home Loan Bank stock	9,888	9,888
Accrued interest receivable	2,471	2,631
Deposits	580,194	622,186
Advances from the Federal Home Loan Bank	61,249	56,310
Repurchase agreements	6,931	5,923
Subordinated debentures	4,863	4,976
Advances by borrowers for taxes and insurance	1,718	2,635
Accrued interest payable	$ 1,823	$ 1,692

Interest, dividends, rents, ancillary and other revenues earned but not yet received by the entity on its investments.

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Fair value portion of accrued expenses.

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Carrying amount of accumulated prepayments received by financial institutions from borrowers for taxes (for example, property taxes) and insurance (for example, property and catastrophe) which will periodically be remitted to the appropriate governmental agency or vendor on behalf of the borrower.

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

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Including both current and noncurrent portions, Federal Home Loan Bank borrowings initially due beyond one year or beyond the normal operating cycle if longer.

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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).

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Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

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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 and loans held for sale.

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Amount of loans held for sale, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans classified as debt securities.

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Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security resale agreement between the entity and another party for the purchase and resale of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

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