Derivatives (Summary Of Types Of Derivatives And Gains (Losses) Recorded) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Gain (Losses)	$ (28,263)	$ (5,320)
Foreign currency derivatives | Other Income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Gain (Losses)	424	471
Interest rate lock commitments | Interest rate contracts | Interest rate commitments
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Gain (Losses)	16,671	1,416
Interest rate forward sales commitments | Interest rate contracts | Interest rate commitments
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Gain (Losses)	(31,052)	(4,727)
Interest rate swaps | Interest rate contracts | Other Income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Gain (Losses)	$ (14,306)	$ (2,480)