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Loans and Allowance for Credit Losses, Modifications to Borrowers Experiencing Financial Difficulty (Details)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2024
Loan
Sep. 30, 2023
Loan
Sep. 30, 2024
Loan
Sep. 30, 2023
USD ($)
Loan
Sep. 30, 2024
USD ($)
Loan
Modifications to Borrowers Experiencing Financial Difficulty [Abstract]          
Number of modified loans to borrowers experiencing financial difficulty | Loan 0 1 0 1 1
Commercial and Industrial [Member]          
Modifications to Borrowers Experiencing Financial Difficulty [Abstract]          
Amortized cost basis       $ 26.6 $ 33.4
Modified loan with subsuequent default         $ 18.5
Financing receivables percentage       4.64%