v3.26.1
Defined Pension Plans - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 9 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Sep. 30, 2025
Defined Benefit Plan Disclosure [Line Items]          
Proceeds from sales of investment securities available-for-sale $ 28,100 $ 30,100 $ 31,621 $ 53,134  
Available-for-sale securities, gross realized gains 125 0 187 0  
Supplemental Employee Retirement Plan          
Defined Benefit Plan Disclosure [Line Items]          
Net periodic cost (benefit) $ 108 $ 112 $ 216 $ 225 $ 450