Derivatives (Summary Of Types Of Derivatives And Gains (Losses) Recorded) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Derivative gains (losses)	$ (1,282)	$ 307
Interest Rate Contracts [Member] | Interest Rate Lock Commitments [Member] | Mortgage Banking Revenue [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative gains (losses)	(298)	110
Interest Rate Contracts [Member] | Interest Rate Forward Sales Commitments [Member] | Mortgage Banking Revenue [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative gains (losses)	(1,568)	197
Interest Rate Contracts [Member] | Interest Rate Swaps [Member] | Other Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative gains (losses)	$ 584