Derivatives (Summary Of Types Of Derivatives And Gains (Losses) Recorded) (Details) (Interest Rate Contracts [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Derivative gains (losses)	$ 10,632	$ (8,107)	$ 15,747	$ (9,386)
Interest Rate Lock Commitments [Member] | Mortgage Banking Revenue [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative gains (losses)	(3,307)	834	(840)	537
Interest Rate Forward Sales Commitments [Member] | Mortgage Banking Revenue [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative gains (losses)	12,116	(8,241)	14,748	(9,807)
Interest Rate Swap [Member] | Other Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative gains (losses)	$ 1,823	$ (700)	$ 1,839	$ (116)