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Contingencies - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Dec. 31, 2022
Mar. 31, 2022
Loss Contingencies [Line Items]        
Unused commitments to extend credit $ 5,424,000     $ 5,052,000
Standby Letters of Credit [Member]        
Loss Contingencies [Line Items]        
Potential exposure to credit loss in the event of nonperformance $ 137,300     202,600
Letters of credit, maturity term - maximum 3 years      
Collateral held, fair value $ 31,300     $ 112,600
Settlement Agreement [Member]        
Loss Contingencies [Line Items]        
Payments for Legal Settlements     $ 100,000  
Litigation Settlement, Expense   $ 100,000    
Legal Fees   $ 750