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Fair Value Measurements (Summary Of Gains And Losses On Level 3 Assets And Liabilities) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Gains and Losses included in earnings for Level 3 assets & liabilities [Line Items] |  |  |  |
Total gains or losses included in earnings | $ 13,942 | $ 12,709 | $ 36,399 | $ 36,313
Change in unrealized gains or losses relating to assets still held | 14,172 | 14,528 | 37,111 | 39,369
Loan fees and sales |  |  |  |
Gains and Losses included in earnings for Level 3 assets & liabilities [Line Items] |  |  |  |
Total gains or losses included in earnings | (230) | (309) | (764) | (1,716)
Change in unrealized gains or losses relating to assets still held | 0 | 1,510 | 0 | 1,510
Other non-interest income |  |  |  |
Gains and Losses included in earnings for Level 3 assets & liabilities [Line Items] |  |  |  |
Total gains or losses included in earnings | 122 | 47 | 30 | 27
Change in unrealized gains or losses relating to assets still held | 122 | 47 | 28 | (143)
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 | 14,050 | 12,971 | 37,133 | 38,002
Change in unrealized gains or losses relating to assets still held | $ 14,050 | $ 12,971 | $ 37,083 | $ 38,002

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