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Loans Receivable - Schedule of Loan Modifications (Details) - Term Extension - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans modified in period, amount | $ 55,821 | $ 63,961
% of Total Loan Class Balance | 0.27% | 0.30%
Commercial loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans modified in period, amount | $ 55,821 | $ 63,961
% of Total Loan Class Balance | 0.48% | 0.55%
Commercial loans | Commercial real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans modified in period, amount |  | $ 93
% of Total Loan Class Balance |  | 0.00%
Wtd. Avg. Term Extension |  | 20 months
Commercial loans | Commercial & industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans modified in period, amount | $ 42,683 | $ 50,730
% of Total Loan Class Balance | 1.87% | 2.22%
Wtd. Avg. Term Extension | 3 months | 3 months
Commercial loans | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans modified in period, amount | $ 13,138 | $ 13,138
% of Total Loan Class Balance | 0.81% | 0.81%
Wtd. Avg. Term Extension | 15 months | 15 months

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