Fair Value Measurements (Details 2) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Estimates of fair values of financial instruments
Cash and cash equivalents	$ 21,033
Investment securities	166,464
Loans	99,360
Bank owned life insurance	3,598
Accrued interest receivable	1,186
Deposits	229,213
Federal funds purchased and repurchase agreements	18,370
Federal Home Loan Bank borrowings	3,628
Accrued interest payable	171
Level I [Member]
Estimates of fair values of financial instruments
Cash and cash equivalents	21,033
Investment securities	213
Bank owned life insurance	3,598
Accrued interest receivable	1,186
Deposits	158,335
Federal funds purchased and repurchase agreements	18,570
Accrued interest payable	171
Level II [Member]
Estimates of fair values of financial instruments
Investment securities	166,221
Deposits	70,878
Federal Home Loan Bank borrowings	3,628
Level III [Member]
Estimates of fair values of financial instruments
Loans	99,360
Carrying Amount [Member]
Estimates of fair values of financial instruments
Cash and cash equivalents	21,033	20,917
Investment securities	166,464	150,961
Loans	98,213	106,925
Bank owned life insurance	3,598	3,518
Accrued interest receivable	1,186	1,140
Deposits	239,321	239,177
Federal funds purchased and repurchase agreements	18,570	14,014
Federal Home Loan Bank borrowings	3,628	3,693
Accrued interest payable	171	218
Fair Value [Member]
Estimates of fair values of financial instruments
Cash and cash equivalents	21,033	20,917
Investment securities	166,464	150,961
Loans	99,360	105,733
Bank owned life insurance	3,598	3,518
Accrued interest receivable	1,186	1,140
Deposits	229,213	227,662
Federal funds purchased and repurchase agreements	18,570	14,014
Federal Home Loan Bank borrowings	3,628	3,693
Accrued interest payable	$ 171	$ 218