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Pension and Other Postretirement Benefits - Components of Net Periodic Other Postretirement Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Net periodic other postretirement benefit costs
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement				$ 0
Defined Benefit Plan, Description	0.8 million
Other postretirement benefit plans [Member]
Net periodic other postretirement benefit costs
Interest cost	$ 98	$ 106	$ 294	318
Amortization of prior service credit	(64)	(63)	(190)	(190)
Recognition of actuarial loss	35	35	104	106
Net periodic other postretirement benefit cost	$ 69	$ 78	$ 208	$ 234

X

- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

+ References

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- Definition

Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan.

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X

- Definition

Amount of cost recognized for passage of time related to defined benefit plan.

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Amount of net periodic benefit cost (credit) for defined benefit plan.

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Amount of gain (loss) recognized in net periodic benefit (cost) credit from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk related to obligation and assets used to effect settlement.

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Description of defined benefit pension and other postretirement plans.

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