Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Carrying value of goodwill by segment
Net Goodwill	$ 60,636	$ 42,135	$ 60,636	$ 60,369
Goodwill impairment		(12,316)	(18,312)
Disposal Group, Including Discontinued Operation, Goodwill		(627)
Translation adjustment		(72)	(189)	267
Net Goodwill		29,120	42,135	60,636
Goodwill attributable to reporting units at risk for impairment		20,900
Goodwill attributable to reporting units at risk for impairment-subsequent event		15,400
Goodwill and other intangible asset impairment	18,300	12,316	18,312	0
Utility and Power Infrastructure
Carrying value of goodwill by segment
Net Goodwill	6,984	4,263	6,984	6,905
Goodwill impairment		0	(2,659)
Disposal Group, Including Discontinued Operation, Goodwill		0
Translation adjustment		(24)	(62)	79
Net Goodwill		4,239	4,263	6,984
Process and Industrial Facilities
Carrying value of goodwill by segment
Net Goodwill	26,878	18,427	26,878	26,846
Goodwill impairment		(12,316)	(8,445)
Disposal Group, Including Discontinued Operation, Goodwill		(627)
Translation adjustment		0	(6)	32
Net Goodwill		5,484	18,427	26,878
Storage and Terminal Solutions
Carrying value of goodwill by segment
Net Goodwill	$ 26,774	19,445	26,774	26,618
Goodwill impairment		0	(7,208)
Disposal Group, Including Discontinued Operation, Goodwill		0
Translation adjustment		(48)	(121)	156
Net Goodwill		$ 19,397	$ 19,445	$ 26,774