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Off-Balance Sheet Loan Commitments (Tables)
9 Months Ended
Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]  
Summary of Financial Instruments with Off-Balance Sheet Risk
The contractual amounts of financial instruments with off-balance sheet risk were as follows:
September 30, 2023December 31, 2022
(Dollars in thousands)Fixed RateVariable RateTotalFixed RateVariable RateTotal
Unused lines of credit$15,441 $563,103 $578,544 $1,417 $487,965 $489,382 
Standby letters of credit$15,725 $9,809 $25,534 $12,309 $4,897 $17,206 
Commitments to purchase loans$— $17,321 $17,321 $— $53,572 $53,572 
Mortgage warehouse commitments$— $851,564 $851,564 $— $1,055,117 $1,055,117 
Credit Loss Expense for Off Balance Sheet Credit Exposures The following table presents credit loss expense for off balance sheet credit exposures:
Three Months Ended September 30,Nine Months Ended September 30,
(Dollars in thousands)2023202220232022
Credit loss expense (benefit)$(253)$(598)$(596)$(402)