Borrowings (Schedule of Maturities of Securities Sold Under Repurchase Agreements) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
Total	$ 67,405	$ 72,728
Securities sold under repurchase agreements - commercial [Member]
Debt Instrument [Line Items]
2013	36,000
2016	25,000
2017	5,187
Total	$ 66,187
2013, Interest Rate	3.33%
2016, Interest Rate	2.61%
2017, Interest Rate	4.67%
Total, Interest Rate	3.16%
Callable date for payments of principal due in year 2016	2013
Callable date for payments of principal due in 2017	2013