Quarterly report pursuant to Section 13 or 15(d)

Pension and Other Postretirement Benefit Plans - Narrative (Details)

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Pension and Other Postretirement Benefit Plans - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2022
Jun. 30, 2024
Jun. 30, 2023
Defined Benefit Plan Disclosure [Line Items]      
Settlement losses   $ 0 $ (24,242)
SERP, DB, and ORRP Plan      
Defined Benefit Plan Disclosure [Line Items]      
Benefit payments $ 24,242    
Settlement losses   $ 1,271