Investment Securities (Proceeds From Sales Of Securities And Components Of Investment Securities Gains And Losses) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Investment [Line Items]
Proceeds from Sale of Available-for-sale Securities		$ 1,101,782	$ 86,240	$ 69,809
Proceeds from sale of equity securities		0	17	0
Proceeds from sales of other securities		40,167	20,714	11,002
Total proceeds		1,141,949	106,971	80,811
Investment securities gains (losses), net	[1]	14,985	20,506	30,059
Available-for-sale Securities [Member]
Investment [Line Items]
Gains realized on sales		143	0	0
Loss realized on sales		(8,587)	(20,273)	(3,284)
Equity securities [Member]
Investment [Line Items]
Gains realized on sales		0	17	0
Fair value adjustments, net		(487)	(943)	187
Other Investments [Member]
Investment [Line Items]
Gains realized on sales		976	1,670	1,611
Other securities, loss realized on sales		(1,076)	(3,798)	(159)
Fair value adjustments, net		$ 24,016	$ 43,833	$ 31,704

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