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Loans - Troubled Debt Restructuring and Loans Accounted for Under ASC Topic 310-30 Narratives (Details)
$ in Millions
 9 Months Ended 12 Months Ended
Sep. 30, 2023
USD ($)
loan
Sep. 30, 2022
USD ($)
loan
Dec. 31, 2022
USD ($)
loan
Debt Instrument [Line Items]      
Value of TDMs/TDRs modified within past 12 months | $ $ 13.5    
TDMs/TDRs that were modified within the past twelve months and had defaulted on their modified terms | loan 1    
Troubled Debt Restructurings [Member]      
Debt Instrument [Line Items]      
Number of restructured loans | loan     10
Amortized cost basis of restructured loans | $     $ 1.1
Value of TDMs/TDRs modified within past 12 months | $   $ 2.3  
TDMs/TDRs that were modified within the past twelve months and had defaulted on their modified terms | loan   2