Investment Securities (Proceeds From Sales Of Securities And Components Of Investment Securities Gains And Losses) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Proceeds from Sale of Debt Securities, Available-for-sale		$ 812,176	$ 0
Proceeds From Sale Of Other Securities		28,259	1,745
Total proceeds		840,435	1,745
Investment securities gains (losses), net	[1]	(306)	7,163
Available-for-sale Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Losses realized on sales		(3,088)	0
Equity Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Equity Securities, FV-NI, Unrealized Gain (Loss)		(127)	(287)
Other Investments [Member]
Debt Securities, Available-for-sale [Line Items]
Other Securities, Gains realized on sales		658	0
Fair value other securities adjustments, net		$ 2,251	$ 7,450

[1] Available for sale debt securities, equity securities, and other securities.