Commitments (Details Textual) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Commitments (Textual) [Abstract]
Amount of overdraft protection on depositors' accounts	$ 9,900,000	$ 10,100,000
Total average daily balance of overdrafts	112,000	120,000
Percentage of average daily balance of overdrafts to aggregate overdraft protection	2.00%	2.00%
Deposit overdrafts included in total loans	$ 109,000	$ 115,000