Segment Data - Sales and Operating (Loss) Income by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Jun. 30, 2024
Segment Reporting Information [Line Items]
Assets	$ 2,435,805		$ 2,435,805		$ 2,503,758
External sales:
Sales	482,051	$ 495,320	963,999	$ 987,796
Operating (income) loss:
Total operating income	31,667	28,479	67,693	73,597
Interest expense	6,180	6,847	12,493	13,447
Other expense, net	(1,477)	(687)	(3,136)	(597)
Income before income taxes	26,964	22,319	58,336	60,747
Infrastructure [Member]
External sales:
Sales	184,266	183,875	369,313	368,121
Operating (income) loss:
Total operating income	(15,612)	(3,236)	(28,347)	(16,880)
Corporate [Member]
Operating (income) loss:
Total operating income	531	284	1,062	927
Metal Cutting
External sales:
Sales	297,785	311,445	594,686	619,675
Operating (income) loss:
Total operating income	$ (16,586)	$ (25,527)	$ (40,408)	$ (57,644)