Interest Expense (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Interest Expense [Abstract]
Interest-bearing demand accounts									$ 73	$ 111	$ 176
Money market accounts									432	591	673
Savings accounts									503	622	1,120
Certificates of deposit greater than $100,000									386	620	1,533
Certificates of deposit less than $100,000									288	782	1,171
Borrowings and junior subordinated debt									823	818	812
Total	$ 569	$ 611	$ 627	$ 698	$ 787	$ 876	$ 904	$ 977	$ 2,505	$ 3,544	$ 5,485