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Intangible Assets Including Goodwill (Tables)
 6 Months Ended
Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]  
Schedule of Goodwill [Table Text Block]
The changes in the carrying value of goodwill by segment are as follows:
Utility and Power InfrastructureProcess and Industrial FacilitiesStorage and Terminal SolutionsTotal
 (In thousands)
Net balance at June 30, 2020$6,905 $26,846 $26,618 $60,369 
Translation adjustment(1)
72 22 142 236 
Net balance at December 31, 2020$6,977 $26,868 $26,760 $60,605 
(1)The translation adjustments relate to the periodic translation of Canadian Dollar and South Korean Won denominated goodwill recorded as a part of prior acquisitions in Canada and South Korea, in which the local currency was determined to be the functional currency.
Schedule Of Intangible Assets Excluding Goodwill Table [Text Block]
Information on the carrying value of other intangible assets is as follows:
  At December 31, 2020
  
Useful LifeGross Carrying
Amount		Accumulated
Amortization		Net Carrying
Amount
 (Years)(In thousands)
Intellectual property10 to 15$2,483 $(1,946)$537 
Customer-based6 to 1517,243 (10,037)7,206 
Total amortizing intangible assets$19,726 $(11,983)$7,743 
 
  At June 30, 2020
 Useful LifeGross Carrying
Amount		Accumulated
Amortization		Net Carrying
Amount
 (Years)(In thousands)
Intellectual property10 to 15$2,579 $(1,956)$623 
Customer-based6 to 1521,840 (13,626)8,214 
Total amortizing intangible assets$24,419 $(15,582)$8,837 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Period ending:
Remainder of Fiscal 2021$1,131 
Fiscal 20221,816 
Fiscal 20231,729 
Fiscal 20241,416 
Fiscal 20251,126 
Fiscal 2026167 
Thereafter358 
Total estimated remaining amortization expense at December 31, 2020$7,743