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Intangible Assets Including Goodwill - Carrying Value of Goodwill By Segment (Details) $ in Thousands	9 Months Ended
	Mar. 31, 2019 USD ($)
Goodwill [Line Items]
Goodwill	$ 96,162
Goodwill [Roll Forward]
Net balance at June 30, 2015	96,162
Goodwill, Written off Related to Sale of Business Unit	(2,775)
Translation adjustment	(71)
Net balance at March 31, 2019	93,316
Electrical Infrastructure [Member]
Goodwill [Line Items]
Goodwill	24,826
Goodwill [Roll Forward]
Net balance at June 30, 2015	24,826
Goodwill, Written off Related to Sale of Business Unit	0
Translation adjustment	(19)
Net balance at March 31, 2019	24,807
Oil Gas & Chemical [Member]
Goodwill [Line Items]
Goodwill	33,604
Goodwill [Roll Forward]
Net balance at June 30, 2015	33,604
Goodwill, Written off Related to Sale of Business Unit	(2,775)
Translation adjustment	0
Net balance at March 31, 2019	30,829
Storage Solutions [Member]
Goodwill [Line Items]
Goodwill	16,760
Goodwill [Roll Forward]
Net balance at June 30, 2015	16,760
Goodwill, Written off Related to Sale of Business Unit	0
Translation adjustment	(49)
Net balance at March 31, 2019	16,711
Industrial [Member]
Goodwill [Line Items]
Goodwill	20,972
Goodwill [Roll Forward]
Net balance at June 30, 2015	20,972
Goodwill, Written off Related to Sale of Business Unit	0
Translation adjustment	(3)
Net balance at March 31, 2019	$ 20,969

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
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-SubTopic 20
-Section 45
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X

- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
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+ References

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- Definition

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- Definition

Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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-SubTopic 20
-Section 50
-Paragraph 1
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