Derivatives (Summary Of Types Of Derivatives, Separately By Assets And Liabilities And Fair Value Of Derivatives) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Other Assets[Member]
Derivatives, Fair Value [Line Items]
Total asset derivatives	$ 9,530	$ 7,955
Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total liability derivatives	7,413	6,509
Interest Rate Contracts [Member] | Interest Rate Lock Commitments [Member] | Other Assets[Member]
Derivatives, Fair Value [Line Items]
Total asset derivatives	1,497	1,752
Interest Rate Contracts [Member] | Interest Rate Lock Commitments [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total liability derivatives	45	3
Interest Rate Contracts [Member] | Interest Rate Forward Sales Commitments [Member] | Other Assets[Member]
Derivatives, Fair Value [Line Items]
Total asset derivatives	548
Interest Rate Contracts [Member] | Interest Rate Forward Sales Commitments [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total liability derivatives	261	90
Interest Rate Contracts [Member] | Interest Rate Swaps [Member] | Other Assets[Member]
Derivatives, Fair Value [Line Items]
Total asset derivatives	7,485	6,203
Interest Rate Contracts [Member] | Interest Rate Swaps [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total liability derivatives	$ 7,107	$ 6,416