Fair Value Measurements (Summary Of Gains And Losses On Level 3 Assets And Liabilities) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Gains and Losses included in earnings for Level 3 assets & liabilities [Line Items]
Total gains or losses included in earnings	$ 2,309	$ 6,955
Change in unrealized gains or losses relating to assets still held at period end	2,309	7,717
Loan fees and sales
Gains and Losses included in earnings for Level 3 assets & liabilities [Line Items]
Total gains or losses included in earnings	77	(485)
Change in unrealized gains or losses relating to assets still held at period end	77	279
Other non-interest income
Gains and Losses included in earnings for Level 3 assets & liabilities [Line Items]
Total gains or losses included in earnings	(19)	(10)
Change in unrealized gains or losses relating to assets still held at period end	(19)	(12)
Investment Securities Gains (Losses), Net
Gains and Losses included in earnings for Level 3 assets & liabilities [Line Items]
Total gains or losses included in earnings	2,251	7,450
Change in unrealized gains or losses relating to assets still held at period end	$ 2,251	$ 7,450