Segment Data - Sales and Operating (Loss) Income by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2021
Segment Reporting Information [Line Items]
Assets	$ 2,610,872		$ 2,610,872		$ 2,665,761
External sales:
Sales	486,673	$ 440,507	970,182	$ 840,812
Operating (income) loss:
Total operating income	47,505	19,034	102,111	1,857
Interest expense	6,460	8,317	12,781	18,896
Other income, net	(3,142)	(3,857)	(6,601)	(7,875)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	44,187	14,574	95,931	(9,164)
Infrastructure [Member]
External sales:
Sales	188,092	157,590	373,171	310,019
Operating (income) loss:
Total operating income	(19,971)	(6,265)	(46,007)	(13,533)
Corporate [Member]
Operating (income) loss:
Total operating income	361	924	955	1,743
Metal Cutting
External sales:
Sales	298,581	282,917	597,011	530,793
Operating (income) loss:
Total operating income	$ (27,895)	$ (13,693)	$ (57,059)	$ 9,933