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Commitments and Contingent Liabilities (Tables)
3 Months Ended
Mar. 31, 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:
March 31, 2023December 31, 2022
 (dollars in thousands)
Financial instruments whose contract amounts represent credit risk:
Commitments to extend credit$2,478,090 $2,356,539 
Financial standby letters of credit19,676 18,417 
Performance standby letters of credit13,401 12,853 
Commercial letters of credit886 573