Retirement Plan and Other Post-Retirement Benefits - Schedule of Expected Benefit Payments (Details) - Other Post-Retirement Benefits $ in Thousands	Sep. 30, 2025 USD ($)
Benefit Payments
2026	$ 26,899
2027	27,556
2028	28,060
2029	28,344
2030	28,406
2031 through 2035	135,297
Subsidy Receipts
2026	(1,560)
2027	(1,574)
2028	(1,577)
2029	(1,577)
2030	(1,568)
2031 through 2035	$ (7,536)

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