Accumulated Other Comprehensive (Loss) Income - Components of and Changes in AOCL (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive (Loss) Income	$ (414,343)
Other comprehensive (loss) income, net of tax	(20,788)	$ (984)	$ (87,189)
Accumulated Other Comprehensive (Loss) Income	(434,588)	(414,343)
Post-retirement Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive (Loss) Income	(215,435)	(208,406)	(213,172)
Net current period other comprehensive loss	(5,873)	(7,029)	4,766
Other comprehensive loss before reclassifications	(10,100)	(10,402)	(4,163)
Amounts reclassified from accumulated other comprehensive loss	4,227	3,373	8,929
Accumulated Other Comprehensive (Loss) Income	(221,308)	(215,435)	(208,406)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive (Loss) Income	(202,641)	(210,048)	(122,428)
Net current period other comprehensive loss	(13,623)	7,407	(87,620)
Other comprehensive loss before reclassifications	(13,623)	7,407	(87,620)
Amounts reclassified from accumulated other comprehensive loss		0	0
Accumulated Other Comprehensive (Loss) Income	(216,264)	(202,641)	(210,048)
Derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive (Loss) Income	3,733	4,503	5,273
Net current period other comprehensive loss	(750)	(770)	(770)
Other comprehensive loss before reclassifications	(26)	0	0
Amounts reclassified from accumulated other comprehensive loss	(725)	(770)	(770)
Accumulated Other Comprehensive (Loss) Income	2,983	3,733	4,503
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive (Loss) Income	(414,343)	(413,951)	(330,327)
Net current period other comprehensive loss	(20,247)	(392)	(83,624)
Other comprehensive loss before reclassifications	(23,749)	(2,995)	(91,783)
Amounts reclassified from accumulated other comprehensive loss	3,502	2,603	8,159
Other comprehensive (loss) income, net of tax	(20,245)	(392)	(83,624)
Accumulated Other Comprehensive (Loss) Income	(434,589)	(414,343)	(413,951)
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	(541)	(592)	(3,565)
Other comprehensive (loss) income, net of tax	(541)	(592)	(3,565)
Accumulated Other Comprehensive (Loss) Income	(8,680)	(8,139)	(7,547)
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	(541)	(592)	(3,565)
Other comprehensive (loss) income, net of tax	(541)	(592)	(3,565)
Accumulated Other Comprehensive (Loss) Income	$ (8,680)	$ (8,139)	$ (7,547)