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Derivatives and Hedging Activities - Interest Rate Contracts (Details) - Interest Rate Swaps - Cash flow hedges - Designated as Hedging Instrument - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended |
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Mar. 31, 2025 | Sep. 30, 2024 | Mar. 31, 2024
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Notional amount | $ 225,000 |  | $ 175,000
Weighted-average maturity period (years) | 3 years 2 months 12 days | 3 years 2 months 12 days |
Weighted-average received rate | 4.32% |  | 4.85%
Weighted-average pay rate | 3.80% |  | 3.83%

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- Definition Average fixed interest rate related to the group of interest rate derivatives. + References No definition available. + Details
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- Definition Average remaining period until maturity of the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A + Details
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- Definition Variable interest rate in effect as of the balance sheet date related to the interest rate derivative. + References No definition available. + Details
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- Details
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- Details
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