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Pension and Other Postretirement Benefits - Components of Net Periodic Pension Income (Details) - Pension plans contribution [Member] - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Net periodic pension income
Service cost	$ 450	$ 411
Interest cost	6,824	7,990
Expected return on plan assets	(13,456)	(13,462)
Amortization of transition obligation	22	23
Amortization of prior service cost (credit)	12	(5)
Recognition of actuarial losses	2,595	1,695
Settlement gain	(122)	0
Net periodic pension income	$ (3,675)	$ (3,348)

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

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