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Commitments and Contingencies (Off-Balance Sheet Financial Instruments) (Details) - USD ($) $ in Thousands | Mar. 31, 2026 | Dec. 31, 2025
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Commitments to Extend Credit [Member] |  |
Loss Contingencies [Line Items] |  |
Contract amounts | $ 9,714,297 | $ 9,650,197
Letters of Credit [Member] |  |
Loss Contingencies [Line Items] |  |
Contract amounts | $ 421,096 | $ 409,010

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