Loans and Allowance for Loan Losses (Details 3) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Information about loans that meet the definition of an impaired loan
Impaired loans with a related allowance for credit losses, Recorded Investment	$ 320	$ 1,436
Impaired loans with a related allowance for credit losses, Unpaid Principal Balance	403	1,436
Impaired loans with a related allowance for credit losses, Average recorded Investment	1,343	920
Impaired loans with a related allowance for credit losses, Specific Allowance	87	411
Impaired loans with a related allowance for credit losses, Income Recognized	7	29
Impaired loans with no related allowance for credit losses, Recorded Investment	2,946	2,991
Impaired loans with no related allowance for credit losses, Unpaid Principal Balance	3,527	3,283
Impaired loans with no related allowance for credit losses, Average Recorded Investment	2,890	2,115
Impaired loans with no related allowance for credit losses, Income Recognized	10	72
Commercial [Member]
Information about loans that meet the definition of an impaired loan
Impaired loans with a related allowance for credit losses, Recorded Investment
Impaired loans with a related allowance for credit losses, Unpaid Principal Balance
Impaired loans with a related allowance for credit losses, Average recorded Investment		3
Impaired loans with a related allowance for credit losses, Specific Allowance
Impaired loans with a related allowance for credit losses, Income Recognized
Impaired loans with no related allowance for credit losses, Recorded Investment	4	155
Impaired loans with no related allowance for credit losses, Unpaid Principal Balance	4	155
Impaired loans with no related allowance for credit losses, Average Recorded Investment	48	56
Impaired loans with no related allowance for credit losses, Income Recognized	2	7
Consumer [Member]
Information about loans that meet the definition of an impaired loan
Impaired loans with a related allowance for credit losses, Recorded Investment
Impaired loans with a related allowance for credit losses, Unpaid Principal Balance
Impaired loans with a related allowance for credit losses, Average recorded Investment
Impaired loans with a related allowance for credit losses, Specific Allowance
Impaired loans with a related allowance for credit losses, Income Recognized
Impaired loans with no related allowance for credit losses, Recorded Investment
Impaired loans with no related allowance for credit losses, Unpaid Principal Balance
Impaired loans with no related allowance for credit losses, Average Recorded Investment
Impaired loans with no related allowance for credit losses, Income Recognized
Residential one-to-four family [Member]
Information about loans that meet the definition of an impaired loan
Impaired loans with a related allowance for credit losses, Recorded Investment	204	705
Impaired loans with a related allowance for credit losses, Unpaid Principal Balance	204	705
Impaired loans with a related allowance for credit losses, Average recorded Investment	699	403
Impaired loans with a related allowance for credit losses, Specific Allowance	81	97
Impaired loans with a related allowance for credit losses, Income Recognized	7	21
Impaired loans with no related allowance for credit losses, Recorded Investment	2,365	2,444
Impaired loans with no related allowance for credit losses, Unpaid Principal Balance	2,491	2,653
Impaired loans with no related allowance for credit losses, Average Recorded Investment	2,417	1,685
Impaired loans with no related allowance for credit losses, Income Recognized	2	53
Commercial real estate [Member]
Information about loans that meet the definition of an impaired loan
Impaired loans with a related allowance for credit losses, Recorded Investment
Impaired loans with a related allowance for credit losses, Unpaid Principal Balance
Impaired loans with a related allowance for credit losses, Average recorded Investment
Impaired loans with a related allowance for credit losses, Specific Allowance
Impaired loans with a related allowance for credit losses, Income Recognized
Impaired loans with no related allowance for credit losses, Recorded Investment
Impaired loans with no related allowance for credit losses, Unpaid Principal Balance
Impaired loans with no related allowance for credit losses, Average Recorded Investment
Impaired loans with no related allowance for credit losses, Income Recognized
Construction [Member]
Information about loans that meet the definition of an impaired loan
Impaired loans with a related allowance for credit losses, Recorded Investment
Impaired loans with a related allowance for credit losses, Unpaid Principal Balance
Impaired loans with a related allowance for credit losses, Average recorded Investment
Impaired loans with a related allowance for credit losses, Specific Allowance
Impaired loans with a related allowance for credit losses, Income Recognized
Impaired loans with no related allowance for credit losses, Recorded Investment
Impaired loans with no related allowance for credit losses, Unpaid Principal Balance
Impaired loans with no related allowance for credit losses, Average Recorded Investment
Impaired loans with no related allowance for credit losses, Income Recognized
Equity lines of credit [Member]
Information about loans that meet the definition of an impaired loan
Impaired loans with a related allowance for credit losses, Recorded Investment	116	731
Impaired loans with a related allowance for credit losses, Unpaid Principal Balance	199	731
Impaired loans with a related allowance for credit losses, Average recorded Investment	644	514
Impaired loans with a related allowance for credit losses, Specific Allowance	6	314
Impaired loans with a related allowance for credit losses, Income Recognized		8
Impaired loans with no related allowance for credit losses, Recorded Investment	577	392
Impaired loans with no related allowance for credit losses, Unpaid Principal Balance	1,032	475
Impaired loans with no related allowance for credit losses, Average Recorded Investment	425	374
Impaired loans with no related allowance for credit losses, Income Recognized	6	12
Indirect auto [Member]
Information about loans that meet the definition of an impaired loan
Impaired loans with a related allowance for credit losses, Recorded Investment
Impaired loans with a related allowance for credit losses, Unpaid Principal Balance
Impaired loans with a related allowance for credit losses, Average recorded Investment
Impaired loans with a related allowance for credit losses, Specific Allowance
Impaired loans with a related allowance for credit losses, Income Recognized
Impaired loans with no related allowance for credit losses, Recorded Investment
Impaired loans with no related allowance for credit losses, Unpaid Principal Balance
Impaired loans with no related allowance for credit losses, Average Recorded Investment
Impaired loans with no related allowance for credit losses, Income Recognized