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Premises and Equipment - Narrative (Details) - USD ($)
$ in Millions
 9 Months Ended 12 Months Ended
Sep. 30, 2023
Dec. 31, 2022
Leases [Abstract]    
Lease liability $ 14.2 $ 15.0
Operating lease, right of use asset $ 13.0 $ 13.9
Operating lease, weighted average remaining lease term (in years) 10 years 10 months 24 days 11 years 7 months 6 days
Operating lease, weighted average discount rate, (as a percentage) 3.10% 3.00%
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Accrued interest payable and other liabilities Accrued interest payable and other liabilities
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Accrued interest receivable and other assets Accrued interest receivable and other assets