Investment Securities (Proceeds From Sales Of Securities And Components Of Investment Securities Gains And Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023		Jun. 30, 2022
Debt Securities, Available-for-sale [Line Items]
Proceeds from Sale of Debt Securities, Available-for-sale			$ 1,101,782		$ 51,948
Proceeds From Sale Of Other Securities			28,754		3,805
Total proceeds			1,130,536		55,753
Investment securities gains (losses), net	$ 3,392	$ 1,029	3,086	[1]	8,192	[1]
Available-for-sale Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gains realized on sales			143		0
Available-for-sale Securities, Losses realized on sales			(8,587)		(9,582)
Equity Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Equity Securities, FV-NI, Unrealized Gain (Loss)			(690)		(1,023)
Other Investments [Member]
Debt Securities, Available-for-sale [Line Items]
Other Securities, Gains realized on sales			879		27
Other Securities, Loss realized on sales			0		(4,313)
Fair value other securities adjustments, net			$ 11,341		$ 23,083

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