Investment Securities (Proceeds From Sales Of Securities And Components Of Investment Securities Gains And Losses) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investment [Line Items]
Proceeds from Sale of Available-for-sale Securities		$ 69,809	$ 602,475	$ 402,103
Proceeds from sale of equity securities		0	2	3,856
Proceeds from sales of other securities		11,002	0	7,244
Total proceeds	[1]	80,811	602,477	413,203
Investment securities gains (losses), net	[1]	30,059	11,032	3,626
Available-for-sale Securities [Member]
Investment [Line Items]
Gains realized on sales		0	21,096	2,354
Loss realized on sales		(3,284)	0	(2,568)
Other-than-temporary impairment recognized on debt securities				(133)
Equity securities [Member]
Investment [Line Items]
Gains realized on sales		0	2	3,262
Equity Securities, FV-NI, Unrealized Gain		187	37	344
Other Investments [Member]
Investment [Line Items]
Gains realized on sales		1,611	0	1,094
Other securities, loss realized on sales		(159)	0	0
Fair value adjustments, net		$ 31,704	$ (10,103)	$ (727)

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