Fair Value Measurements (Fair Value Mortgage Loans Held For Sale, Commitments to Originate And Commitments to Sell Changes in Fair Value Disclosures) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Fair Value Disclosures [Abstract]
Mortgage loans held for sale	$ 970	$ 716	$ 0
Commitments to originate	649	1,968	54
Commitments to sell	(1,611)	(3,119)	228
Total change in fair value	$ 8	$ (435)	$ 282