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Intangible Assets Including Goodwill - Carrying Value of Goodwill By Segment (Details)
$ in Thousands
 3 Months Ended
Sep. 30, 2022
USD ($)
Goodwill [Line Items]  
Goodwill $ 41,916
Goodwill [Roll Forward]  
Net balance at June 30, 2021 42,135
Translation adjustment (219)
Net balance at September 30, 2022 41,916
Goodwill Attributable To Reporting Units At Risk For Impairment 33,800
Utility and Power Infrastructure  
Goodwill [Line Items]  
Goodwill 4,189
Goodwill [Roll Forward]  
Net balance at June 30, 2021 4,263
Translation adjustment (74)
Net balance at September 30, 2022 4,189
Process and Industrial Facilities  
Goodwill [Line Items]  
Goodwill 18,427
Goodwill [Roll Forward]  
Net balance at June 30, 2021 18,427
Translation adjustment 0
Net balance at September 30, 2022 18,427
Storage and Terminal Solutions  
Goodwill [Line Items]  
Goodwill 19,300
Goodwill [Roll Forward]  
Net balance at June 30, 2021 19,445
Translation adjustment (145)
Net balance at September 30, 2022 $ 19,300