Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020	May 31, 2022
Carrying value of goodwill by segment
Net Goodwill	$ 60,636	$ 60,369	$ 93,368
Goodwill impairment	(18,312)		(32,881)
Translation adjustment	(189)	267	(118)
Net Goodwill	42,135	60,636	60,369
Goodwill attributable to reporting units at risk for impairment				$ 33,800
Utility and Power Infrastructure
Carrying value of goodwill by segment
Net Goodwill	6,984	6,905	31,840
Goodwill impairment	(2,659)		(24,900)
Translation adjustment	(62)	79	(35)
Net Goodwill	4,263	6,984	6,905
Process and Industrial Facilities
Carrying value of goodwill by segment
Net Goodwill	26,878	26,846	34,842
Goodwill impairment	(8,445)		(7,981)
Translation adjustment	(6)	32	(15)
Net Goodwill	18,427	26,878	26,846
Storage and Terminal Solutions
Carrying value of goodwill by segment
Net Goodwill	26,774	26,618	26,686
Goodwill impairment	(7,208)		0
Translation adjustment	(121)	156	(68)
Net Goodwill	$ 19,445	$ 26,774	$ 26,618