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Segment Information - Results of Operations (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Mar. 31, 2018 | Mar. 31, 2017 | Jun. 30, 2017
Segment Reporting Information [Line Items] |  |  |  |  |
Gross revenues | $ 247,902 | $ 252,259 | $ 802,318 | $ 914,513 |
Revenues | 245,645 | 251,237 | 798,466 | 905,673 |
Gross profit | 14,891 | (2,614) | 70,485 | 57,876 |
Operating income | (5,862) | (21,210) | 6,633 | 1,328 |
Segment assets | 539,239 |  | 539,239 |  | $ 586,030
Electrical Infrastructure [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross revenues | 58,378 | 82,032 | 203,201 | 273,215 |
Revenues | 58,378 | 82,032 | 203,201 | 273,215 |
Gross profit | 1,759 | (13,371) | 15,567 | (896) |
Operating income | (2,422) | (16,306) | 2,234 | (13,085) |
Segment assets | 180,837 |  | 180,837 |  | 183,351
Oil Gas & Chemical [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross revenues | 68,689 | 69,295 | 242,946 | 164,036 |
Revenues | 68,390 | 68,888 | 242,402 | 157,144 |
Gross profit | 4,744 | 4,333 | 27,550 | 6,765 |
Operating income | (648) | (2,199) | 8,684 | (7,054) |
Segment assets | 115,112 |  | 115,112 |  | 129,177
Storage Solutions [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross revenues | 78,859 | 74,431 | 221,664 | 403,008 |
Revenues | 76,901 | 74,052 | 218,357 | 402,331 |
Gross profit | 4,166 | 5,456 | 17,004 | 48,980 |
Operating income | (4,025) | (1,552) | (6,709) | 23,463 |
Segment assets | 142,610 |  | 142,610 |  | 166,742
Industrial [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross revenues | 41,976 | 26,501 | 134,507 | 74,254 |
Revenues | 41,976 | 26,265 | 134,506 | 72,983 |
Gross profit | 4,222 | 968 | 10,364 | 3,027 |
Operating income | 1,233 | (1,153) | 2,424 | (1,996) |
Segment assets | 43,906 |  | 43,906 |  | 53,754
Other Segments [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Segment assets | 56,774 |  | 56,774 |  | $ 53,006
Intersegment Eliminations [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross revenues | 2,257 | 1,022 | 3,852 | 8,840 |
Intersegment Eliminations [Member] | Oil Gas & Chemical [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross revenues | 299 | 407 | 544 | 6,892 |
Intersegment Eliminations [Member] | Storage Solutions [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross revenues | 1,958 | 379 | 3,307 | 677 |
Intersegment Eliminations [Member] | Industrial [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross revenues | $ 0 | $ 236 | $ 1 | $ 1,271 |

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