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Intangible Assets Including Goodwill - Carrying Value of Goodwill By Segment (Details) - USD ($) $ in Thousands | 9 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2016 | Feb. 01, 2016 | Jun. 30, 2015
Goodwill [Line Items] |  |  |  |
Goodwill |  |  |  | $ 96,518
Cumulative impairment loss | [1] |  |  | (25,000)
Goodwill |  | $ 71,518 |  | 71,518
Goodwill [Roll Forward] |  |  |  |
Net balance at June 30, 2015 |  | 71,518 |  |
Goodwill, Acquired During Period |  | 7,618 |  |
Translation adjustment | [2] | (291) |  |
Net balance at March 31, 2016 |  | 78,845 |  |
Electrical Infrastructure [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill |  |  |  | 60,027
Cumulative impairment loss | [1] |  |  | (17,653)
Goodwill |  | 42,374 |  | 42,374
Goodwill [Roll Forward] |  |  |  |
Net balance at June 30, 2015 |  | 42,374 |  |
Goodwill, Acquired During Period |  | 0 |  |
Translation adjustment | [2] | (240) |  |
Net balance at March 31, 2016 |  | 42,134 |  |
Oil Gas & Chemical [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill |  |  |  | 17,008
Cumulative impairment loss | [1] |  |  | (3,000)
Goodwill |  | 14,008 |  | 14,008
Goodwill [Roll Forward] |  |  |  |
Net balance at June 30, 2015 |  | 14,008 |  |
Goodwill, Acquired During Period |  | 0 |  |
Translation adjustment |  | 0 |  |
Net balance at March 31, 2016 |  | 14,008 |  |
Storage Solutions [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill |  |  |  | 10,586
Cumulative impairment loss | [1] |  |  | (922)
Goodwill |  | 9,664 |  | 9,664
Goodwill [Roll Forward] |  |  |  |
Net balance at June 30, 2015 |  | 9,664 |  |
Translation adjustment | [2] | (6) |  |
Net balance at March 31, 2016 |  | 17,276 |  |
Industrial [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill |  |  |  | 8,897
Cumulative impairment loss | [1] |  |  | (3,425)
Goodwill |  | 5,472 |  | $ 5,472
Goodwill [Roll Forward] |  |  |  |
Net balance at June 30, 2015 |  | 5,472 |  |
Goodwill, Acquired During Period |  | 0 |  |
Translation adjustment | [2] | (45) |  |
Net balance at March 31, 2016 |  | $ 5,427 |  |
Baillie Tank Equipment, Ltd. [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill |  |  | $ 7,618 |
[1] | A $25.0 million impairment charge was recorded in February 2005.
[2] | 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.

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- 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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