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Commitments and Contingent Liabilities (Tables)
6 Months Ended
Jun. 30, 2023
Commitments and Contingencies Disclosure [Abstract]  
Notional Amount of Outstanding Commitments The following table identifies the notional amount of those instruments at the date shown below:
June 30, 2023December 31, 2022
 (dollars in thousands)
Financial instruments whose contract amounts represent credit risk:
Commitments to extend credit$2,576,168 $2,356,539 
Financial standby letters of credit19,190 18,417 
Performance standby letters of credit14,625 12,853 
Commercial letters of credit876 573