Fair Value Measurements - Fair Value by Balance Sheet Grouping (Details) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Carrying Value
Financial assets:
Cash and due from banks	$ 21,124,000	$ 19,409,000
Interest-earning deposits in other banks	55,074,000	24,467,000
Federal funds sold	721,000	928,000
Available-for-sale investment securities	364,808,000	328,413,000
Loans, net	388,922,000	415,999,000
Federal Home Loan Bank stock	3,850,000	2,893,000
Accrued interest receivable	3,778,000	3,953,000
Financial liabilities:
Deposits	737,286,000	712,986,000
Debt	4,000,000	4,000,000
Junior subordinated deferrable interest debentures	5,155,000	5,155,000
Accrued interest payable	157,000	230,000
Level 1
Financial assets:
Cash and due from banks	21,124,000
Interest-earning deposits in other banks	55,074,000
Federal funds sold	721,000
Available-for-sale investment securities	8,040,000
Loans, net	0
Accrued interest receivable	29,000
Financial liabilities:
Deposits	0
Debt	0
Junior subordinated deferrable interest debentures	0
Accrued interest payable	0
Level 2
Financial assets:
Cash and due from banks	0
Interest-earning deposits in other banks	0
Federal funds sold	0
Available-for-sale investment securities	356,768,000
Loans, net	0
Accrued interest receivable	1,903,000
Financial liabilities:
Deposits	758,806,000
Debt	4,049,000
Junior subordinated deferrable interest debentures	0
Accrued interest payable	130,000
Level 3
Financial assets:
Cash and due from banks	0
Interest-earning deposits in other banks	0
Federal funds sold	0
Available-for-sale investment securities	0
Loans, net	392,854,000
Accrued interest receivable	1,846,000
Financial liabilities:
Deposits	0
Debt	0
Junior subordinated deferrable interest debentures	2,990,000
Accrued interest payable	27,000
Fair Value
Financial assets:
Cash and due from banks	21,124,000	19,409,000
Interest-earning deposits in other banks	55,074,000	24,467,000
Federal funds sold	721,000	928,000
Available-for-sale investment securities	364,808,000	328,413,000
Loans, net	392,854,000	418,084,000
Accrued interest receivable	3,778,000	3,953,000
Financial liabilities:
Deposits	758,806,000	719,673,000
Debt	4,049,000	4,146,000
Junior subordinated deferrable interest debentures	2,990,000	2,706,000
Accrued interest payable	$ 157,000	$ 230,000

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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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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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