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Securities - Schedule of Activity in Allowance for Credit Losses for Held-to-maturity Securities (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2023
Dec. 31, 2022
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Roll Forward]    
Beginning Balance $ 0 $ 0
Impact on CECL adoption 662 0
Provision for credit losses (15) 0
Ending Balance $ 647 $ 0