Annual report pursuant to Section 13 and 15(d)

DERIVATIVES AND HEDGING ACTIVITIES - Interest Rate Contracts (Details)

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DERIVATIVES AND HEDGING ACTIVITIES - Interest Rate Contracts (Details) - Interest Rate Swaps - Cash Flow Hedging - Designated as Hedging Instrument - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Mar. 31, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Notional amount $ 175,000 $ 125,000 $ 175,000
Weighted-average maturity period (years) 4 years 1 month 6 days 3 years 1 month 6 days  
Weighted-average received rate 5.32% 3.14%  
Weighted-average pay rate 3.83% 1.04%