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Commitments and Contingencies (Narrative) (Details) - USD ($) | 3 Months Ended | 13 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023 | Nov. 30, 2024 | Mar. 31, 2023 | Dec. 31, 2022
Other Commitments [Line Items] |  |  |  |  |
Reserve for unfunded lending commitments | $ 27,063,000 | $ 28,894,000 |  | $ 32,014,000 | $ 33,309,000
Federal Deposit Insurance Corporation (FDIC) Special Assessment [Member] |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |
Pre-tax special assessment expense |  | $ 26,100,000 |  |  |
Additional special assessment expense | 3,800,000 |  |  |  |
Federal Deposit Insurance Corporation (FDIC) Special Assessment [Member] | Silicon Valley Bank and Signature Bank [Member] |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |
Increase in estimated losses attributable to protection of uninsured depositors | 4,100,000,000 |  |  |  |
Estimated losses attributable to protection of uninsured depositors | $ 20,400,000,000 |  | $ 16,300,000,000 |  |

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- Definition Additional special assessment expense. + References No definition available. + Details
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X
- Definition Estimated losses attributable to protection of uninsured depositors. + References No definition available. + Details
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- Definition Increase in estimated losses attributable to protection of uninsured depositors. + References No definition available. + Details
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- Definition Pre-tax special assessment expense. + References No definition available. + Details
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- Details
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- Details
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