Derivatives (Summary Of Types Of Derivatives And Gains (Losses) Recorded) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Gain (Losses)	$ (5,997)	$ (3,299)	$ (41,965)	$ (16,752)
Foreign currency derivatives | Other Income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Gain (Losses)	585	527	1,567	1,522
Interest rate lock commitments | Interest rate contracts | Interest rate commitments
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Gain (Losses)	3,303	922	21,784	2,313
Interest rate forward sales commitments | Interest rate contracts | Interest rate commitments
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Gain (Losses)	(11,650)	(2,467)	(51,952)	(11,875)
Interest rate swaps | Interest rate contracts | Other Income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Gain (Losses)	$ 1,765	$ (2,281)	$ (13,364)	$ (8,712)