Segment Data - Sales and Operating (Loss) Income by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Jun. 30, 2021
Segment Reporting Information [Line Items]
Assets	$ 2,659,513		$ 2,659,513		$ 2,665,761
External sales:
Sales	512,259	$ 484,658	1,482,441	$ 1,325,470
Operating (income) loss:
Total operating income	53,364	39,522	155,475	41,378
Interest expense	6,436	20,928	19,217	39,823
Other income, net	(4,528)	(2,692)	(11,129)	(10,568)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	51,456	21,286	147,387	12,123
Infrastructure [Member]
External sales:
Sales	198,446	176,514	571,617	486,533
Operating (income) loss:
Total operating income	(23,673)	(18,282)	(69,680)	(31,815)
Corporate [Member]
Operating (income) loss:
Total operating income	541	1,434	1,497	3,178
Metal Cutting
External sales:
Sales	313,813	308,144	910,824	838,937
Operating (income) loss:
Total operating income	$ (30,232)	$ (22,674)	$ (87,292)	$ (12,741)