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Intangible Assets Including Goodwill - Carrying Value of Goodwill By Segment (Details) - USD ($) $ in Thousands | 9 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2017 | Dec. 12, 2016 | Feb. 01, 2016
Goodwill [Line Items] |  |  |
Goodwill | $ 78,293 |  |
Goodwill [Roll Forward] |  |  |
Net balance at June 30, 2015 | 78,293 |  |
Goodwill, Acquired During Period | 35,048 |  |
Goodwill, Purchase Accounting Adjustments | 88 |  |
Translation adjustment | (247) |  |
Net balance at March 31, 2017 | 113,182 |  |
Electrical Infrastructure [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 42,170 |  |
Goodwill [Roll Forward] |  |  |
Net balance at June 30, 2015 | 42,170 |  |
Goodwill, Acquired During Period | 0 |  |
Goodwill, Purchase Accounting Adjustments | 0 |  |
Translation adjustment | (175) |  |
Net balance at March 31, 2017 | 41,995 |  |
Oil Gas & Chemical [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 14,008 |  |
Goodwill [Roll Forward] |  |  |
Net balance at June 30, 2015 | 14,008 |  |
Goodwill, Acquired During Period | 28,739 |  |
Goodwill, Purchase Accounting Adjustments | 0 |  |
Translation adjustment | 0 |  |
Net balance at March 31, 2017 | 42,747 |  |
Storage Solutions [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 16,681 |  |
Goodwill [Roll Forward] |  |  |
Net balance at June 30, 2015 | 16,681 |  |
Goodwill, Acquired During Period | 0 |  |
Goodwill, Purchase Accounting Adjustments | 88 |  |
Translation adjustment | (39) |  |
Net balance at March 31, 2017 | 16,730 |  |
Industrial [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 5,434 |  |
Goodwill [Roll Forward] |  |  |
Net balance at June 30, 2015 | 5,434 |  |
Goodwill, Acquired During Period | 6,309 |  |
Goodwill, Purchase Accounting Adjustments | 0 |  |
Translation adjustment | (33) |  |
Net balance at March 31, 2017 | $ 11,710 |  |
Baillie Tank Equipment, Ltd. [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill |  |  | $ 7,030
Houston Interests, LLC [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill |  | $ 35,048 |

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