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Commitments and Contingencies (Details) - USD ($)
Jun. 30, 2023
Dec. 31, 2022
Supply Commitment [Line Items]    
Loss contingencies for all legal claims $ 225,000 $ 229,000
Loss contingencies for all legal claims 225,000 229,000
Commitments to extend credit    
Supply Commitment [Line Items]    
Commitments and letters of credit 2,761,027,000 2,856,263,000
Standby letters of credit    
Supply Commitment [Line Items]    
Commitments and letters of credit 124,060,000 132,538,000
Other letters of credit    
Supply Commitment [Line Items]    
Commitments and letters of credit 52,674,000 22,376,000
Commitments to fund investments in affordable housing partnerships    
Supply Commitment [Line Items]    
Commitments and letters of credit $ 9,322,000 $ 11,792,000