Intangible Assets Including Goodwill - Carrying Value of Goodwill By Segment (Details) $ in Thousands	6 Months Ended
	Dec. 31, 2022 USD ($)
Goodwill [Line Items]
Goodwill	$ 29,733
Goodwill [Roll Forward]
Net balance at June 30, 2022	42,135
Goodwill impairment	(12,316)
Translation adjustment	(86)
Net balance at December 31, 2022	29,733
Goodwill Attributable To Reporting Units At Risk For Impairment	33,800
Utility and Power Infrastructure
Goodwill [Line Items]
Goodwill	4,234
Goodwill [Roll Forward]
Net balance at June 30, 2022	4,263
Goodwill impairment	0
Translation adjustment	(29)
Net balance at December 31, 2022	4,234
Process and Industrial Facilities
Goodwill [Line Items]
Goodwill	6,111
Goodwill [Roll Forward]
Net balance at June 30, 2022	18,427
Goodwill impairment	(12,316)
Translation adjustment	0
Net balance at December 31, 2022	6,111
Storage and Terminal Solutions
Goodwill [Line Items]
Goodwill	19,388
Goodwill [Roll Forward]
Net balance at June 30, 2022	19,445
Goodwill impairment	0
Translation adjustment	(57)
Net balance at December 31, 2022	$ 19,388