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Subordinated Debentures (Tables)
 9 Months Ended
Sep. 30, 2023
Debt Disclosure [Abstract]  
Schedule of Outstanding Subordinated Debentures
The following table summarizes our outstanding subordinated debentures as of the dates indicated:
 Carrying Value
(Dollars in thousands)Stated MaturityCurrent Interest RateCurrent Principal BalanceSeptember 30, 2023December 31, 2022
Subordinated notes
Subordinated notes due 2024, 5.75% per annum
September 3, 20245.75 %$60,000 $59,880 $59,791 
Subordinated notes due 2029, 4.875% per annum until May 15, 2024, 3-month term SOFR +2.762% thereafter
May 15, 20294.875 %125,000 123,577 123,386 
Subordinated notes due 2030, 5.375% per annum until June 15, 2025, 3-month term SOFR +5.170% thereafter
June 15, 20305.375 %150,000 148,225 148,027 
Total subordinated debentures$335,000 $331,682 $331,204