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Commitments and Contingencies (Off-Balance Sheet Financial Instruments) (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
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