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Pension and Other Postretirement Benefits - Components of Net Periodic Other Postretirement Benefit Cost (Details) - Other postretirement benefit plans [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Net periodic other postretirement benefit costs
Interest cost	$ 72	$ 76	$ 216	$ 230
Amortization of prior service credit	(69)	(69)	(207)	(207)
Recognition of actuarial loss	74	77	223	230
Net periodic other postretirement benefit cost	$ 77	$ 84	$ 232	$ 253

X

- Definition

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

+ References

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

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

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