Credit Quality (Details Textual) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2012 D	Dec. 31, 2011
Credit Quality (Textual) [Abstract]
Minimum days for discontinue of accrual interest on commercial and consumer loan	90
Maximum days for discontinue of accrual interest on commercial and consumer loan	120
Troubled debt restructuring	$ 4,335	$ 3,592
Aggregate balance of TDR	37,135,000	38,954,000
Loans on nonaccrual status	2,283	61,420,000
Loans past due 90 days or more and still accruing interest	9,816,000	16,179,000
Restructured loans modified by reduction in interest	2,052
Restructured Loan and Interest	1,508
Post-Modification Outstanding Recorded Investment	775,000
Minimum number of days require special mention	90 days
Maximum number of days require special mention	30 days
Number of days when TDR's considered past due	89 days
Troubled Debt Restructuring [Member]
Credit Quality (Textual) [Abstract]
Aggregate balance of TDR	4,335
Loans on nonaccrual status		$ 1,528