Quarterly report [Sections 13 or 15(d)]

Derivatives and Hedging Activities - Interest Rate Contracts (Details)

v3.25.1
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
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%