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
	Mar. 31, 2013	Mar. 31, 2012
Fair Value Disclosures [Abstract]
Mortgage loans held for sale	$ (1,061)	$ (231)
Commitments to originate	(918)	(49)
Commitments to sell	1,971	280
Total change in fair value	$ (8)	$ 0