Guarantees (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Guarantees [Abstract]
Commitments to Extend Credit, Nominal Amount	$ 198,405	$ 203,556
Standby Letters of Credit, Nominal Amount	10,929	11,641
Commitments to Extend Credit, Fair Value	198,405	203,556
Standby Letters of Credit, Fair Value	$ 10,929	$ 11,641