Derivatives (Summary Of Types Of Derivatives And Gains (Losses) Recorded) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Derivative gains (losses)	$ (8,310)	$ 8,938	$ (16,315)	$ 7,418
Foreign Exchange Contract | Other Income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative gains (losses)	332	283	593	491
Interest Rate Lock Commitments | Interest Rate Contracts | Mortgage Banking Revenue
Derivative Instruments, Gain (Loss) [Line Items]
Derivative gains (losses)	2,774	(2,963)	7,398	1,194
Interest Rate Forward Sales Commitments | Interest Rate Contracts | Mortgage Banking Revenue
Derivative Instruments, Gain (Loss) [Line Items]
Derivative gains (losses)	(9,923)	10,212	(21,020)	5,108
Interest Rate Swap | Interest Rate Contracts | Other Income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative gains (losses)	$ (1,493)	$ 1,406	$ (3,286)	$ 625