Fair Value Information (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Financial assets:
Securities available for sale	$ 64,525	$ 90,344
Carrying Amount [Member]
Financial assets:
Securities available for sale	64,525	90,344
Fair Value [Member]
Financial assets:
Securities available for sale	64,525	90,344
Level 1 [Member] | Carrying Amount [Member]
Financial assets:
Cash and cash equivalents	50,334	42,185
Federal funds sold	276	287
Accrued interest receivable	2,059	2,148
Financial liabilities:
Securities sold under agreements to repurchase and overnight borrowings	(16,134)	(18,074)
Accrued interest payable	(108)	(131)
Level 1 [Member] | Fair Value [Member]
Financial assets:
Cash and cash equivalents	50,334	42,185
Federal funds sold	276	287
Accrued interest receivable	2,059	2,148
Financial liabilities:
Securities sold under agreements to repurchase and overnight borrowings	(16,134)	(18,074)
Accrued interest payable	(108)	(131)
Level 2 [Member] | Carrying Amount [Member]
Financial liabilities:
Deposits	(444,170)	(420,511)
Other borrowings	(1,039)	(7,751)
Level 2 [Member] | Fair Value [Member]
Financial liabilities:
Deposits	(445,371)	(422,493)
Other borrowings	(1,049)	(7,860)
Level 3 [Member] | Carrying Amount [Member]
Financial assets:
Loans held for sale	1,776	1,088
Loans, net of allowance for loan losses	364,150	327,392
Financial liabilities:
Subordinated debentures	(5,155)	(5,155)
Level 3 [Member] | Fair Value [Member]
Financial assets:
Loans held for sale	1,776	1,088
Loans, net of allowance for loan losses	368,715	333,283
Financial liabilities:
Subordinated debentures	$ (5,155)	$ (5,155)