Derivatives (Summary Of Types Of Derivatives And Gains (Losses) Recorded) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Gain (Losses)	$ (5,355)	$ (5,997)	$ 6,133	$ (41,965)
Foreign currency derivatives | Other Income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Gain (Losses)	718	585	1,985	1,567
Interest rate lock commitments | Interest rate contracts | Interest rate commitments
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Gain (Losses)	(4,952)	3,303	(19,886)	21,784
Interest rate forward sales commitments | Interest rate contracts | Interest rate commitments
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Gain (Losses)	(2,550)	(11,650)	15,336	(51,952)
Interest rate swaps | Interest rate contracts | Other Income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Gain (Losses)	$ 1,429	$ 1,765	$ 8,698	$ (13,364)