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	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Fair Value Disclosures [Abstract]
Mortgage loans held for sale	$ 850	$ 828	$ 956	$ 828
Commitments to originate	1,810	2,514	3,009	2,547
Commitments to sell	(2,660)	(3,304)	(3,965)	(3,810)
Total change in fair value	$ 0	$ 38	$ 0	$ (435)