Accumulated Other Comprehensive (Loss) Income - Components of and Changes in AOCL (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive (Loss) Income	$ (414,343)	$ (413,951)
Other comprehensive (loss) income, net of tax	(984)	(87,189)	$ 88,844
Post-retirement Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive (Loss) Income	(215,435)	(208,406)	(213,172)
Other comprehensive loss before reclassifications	(10,402)	(4,163)	9,107
Amounts reclassified from accumulated other comprehensive loss	3,373	8,929	10,355
Net current period other comprehensive loss	(7,029)	4,766	19,462
Derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive (Loss) Income	3,733	4,503	5,273
Other comprehensive loss before reclassifications	0	0	9,255
Amounts reclassified from accumulated other comprehensive loss	(770)	(770)	(401)
Net current period other comprehensive loss	(770)	(770)	8,854
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive (Loss) Income	(414,343)	(413,951)	(330,327)
Other comprehensive loss before reclassifications	(2,995)	(91,783)	76,961
Other comprehensive (loss) income, net of tax	(392)	(83,624)	86,915
Amounts reclassified from accumulated other comprehensive loss	2,603	8,159	9,954
Net current period other comprehensive loss	(392)	(83,624)	86,915
Accumulated Foreign Currency Adjustment Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive (Loss) Income	(8,139)	(7,547)	(3,982)
Other comprehensive loss before reclassifications	(592)	(3,565)	1,927
Other comprehensive (loss) income, net of tax	(592)	(3,565)	1,927
AOCI Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive (Loss) Income	(8,139)	(7,547)	(3,982)
Other comprehensive loss before reclassifications	(592)	(3,565)	1,927
Other comprehensive (loss) income, net of tax	(592)	(3,565)	1,927
Reclassification out of Accumulated Other Comprehensive Income [Member] | Interest Rate Swap [Member] | Derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest Income (Expense), Net	$ (1,020)	$ (1,020)	$ 4,082