Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Carrying value of goodwill by segment
Net Goodwill	$ 93,368	$ 96,162	$ 113,501
Goodwill impairment	(32,881)		(17,281)
Disposal of business		(2,775)
Translation adjustment	(118)	(19)	(58)
Net Goodwill	60,369	93,368	96,162
Goodwill attributable to reporting units at risk for impairment	14,200
Electrical Infrastructure [Member]
Carrying value of goodwill by segment
Net Goodwill	24,830	24,826	42,152
Goodwill impairment	(24,900)		(17,281)
Disposal of business		0
Translation adjustment	70	4	(45)
Net Goodwill	0	24,830	24,826
Oil Gas & Chemical [Member]
Carrying value of goodwill by segment
Net Goodwill	30,829	33,604	33,604
Goodwill impairment	0		0
Disposal of business		(2,775)
Translation adjustment	0	0	0
Net Goodwill	30,829	30,829	33,604
Storage Solutions [Member]
Carrying value of goodwill by segment
Net Goodwill	16,736	16,760	16,764
Goodwill impairment	0		0
Disposal of business		0
Translation adjustment	(169)	(24)	(4)
Net Goodwill	16,567	16,736	16,760
Industrial [Member]
Carrying value of goodwill by segment
Net Goodwill	20,973	20,972	20,981
Goodwill impairment	(7,981)		0
Disposal of business		0
Translation adjustment	(19)	1	(9)
Net Goodwill	$ 12,973	$ 20,973	$ 20,972