Federal Home Loan Bank Advances Federal Home Loan Bank Advances (Other Narratives) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 21, 2012	Dec. 31, 2011
Line of Credit Facility [Line Items]
Weighted average interest rate, Federal Home Loan Bank advances			3.89%
Additional borrowing capacity, Federal Home Loan Bank advances	$ 69,533
Federal Home Loan Bank advances, amount modified		80,000
Federal funds lines of credit at correspondent banks [Member]
Line of Credit Facility [Line Items]
Amount standing, line of credit	0
Federal funds lines of credit at correspondent banks [Member] | Unsecured debt [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity, line of credit	57,000
Federal funds lines of credit at correspondent banks [Member] | Secured debt [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity, line of credit	$ 10,000