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Loans and Allowance for Credit Losses Narrative (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Minimum balance of loans evaluated individually for impairment $ 1,000,000.0   $ 1,000,000.0
Impaired loans with principal balances approximately in percentage 97.00%   90.00%
Impaired loans balances, real estate as collateral $ 1,000,000.0    
Net loans 23,862,574,000   $ 24,044,919,000
Borrowers with loan modifications, commitments to lend additional funds 0    
Net loans (charged off) recovered (12,591,000) $ (8,598,000)  
Without a Related Allowance 68,154,000   $ 105,173,000
Loans - Excluding OBS Credit Exposure      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Net loans (charged off) recovered $ (12,591,000) $ (8,598,000)