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Segment Information - Results of Operations (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Mar. 31, 2016 | Mar. 31, 2015 | Mar. 31, 2016 | Mar. 31, 2015 | Jun. 30, 2015
Segment Reporting Information [Line Items] |  |  |  |  |
Gross revenues | $ 310,172 | $ 318,321 | $ 956,568 | $ 985,814 |
Consolidated revenues | 309,422 | 314,155 | 952,282 | 978,718 |
Gross profit | 27,303 | 2,632 | 91,892 | 46,966 |
Operating income | 6,347 | (14,448) | 26,383 | (9,572) |
Segment assets | 549,642 |  | 549,642 |  | $ 561,689
Goodwill | 78,845 |  | 78,845 |  | 71,518
Electrical Infrastructure [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross revenues | 94,414 | 48,228 | 251,437 | 162,434 |
Consolidated revenues | 94,414 | 48,228 | 251,437 | 162,434 |
Gross profit | 10,407 | (22,429) | 19,136 | (38,976) |
Operating income | 4,948 | (24,306) | 5,425 | (46,484) |
Segment assets | 135,305 |  | 135,305 |  | 129,725
Goodwill | 42,134 |  | 42,134 |  | 42,374
Oil Gas & Chemical [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross revenues | 56,251 | 97,612 | 188,682 | 228,230 |
Consolidated revenues | 55,729 | 95,758 | 185,580 | 224,574 |
Gross profit | 2,616 | 7,261 | 14,270 | 18,999 |
Operating income | (1,964) | 2,563 | (3,577) | 5,823 |
Segment assets | 99,007 |  | 99,007 |  | 108,960
Goodwill | 14,008 |  | 14,008 |  | 14,008
Storage Solutions [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross revenues | 132,857 | 107,640 | 400,074 | 370,977 |
Consolidated revenues | 132,629 | 107,163 | 399,034 | 370,259 |
Gross profit | 15,108 | 11,247 | 49,766 | 39,996 |
Operating income | 6,382 | 5,055 | 24,305 | 18,785 |
Segment assets | 193,218 |  | 193,218 |  | 172,857
Goodwill | 17,276 |  | 17,276 |  | 9,664
Industrial [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross revenues | 26,650 | 64,841 | 116,375 | 224,173 |
Consolidated revenues | 26,650 | 63,006 | 116,231 | 221,451 |
Gross profit | (828) | 6,553 | 8,720 | 26,947 |
Operating income | (3,019) | 2,240 | 230 | 12,304 |
Segment assets | 56,183 |  | 56,183 |  | 102,761
Goodwill | 5,427 |  | 5,427 |  | 5,472
Other Segments [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Segment assets | 65,929 |  | 65,929 |  | $ 47,386
Intersegment Eliminations [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross revenues | 750 | 4,166 | 4,286 | 7,096 |
Intersegment Eliminations [Member] | Electrical Infrastructure [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross revenues | 0 | 0 | 0 | 0 |
Intersegment Eliminations [Member] | Oil Gas & Chemical [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross revenues | 522 | 1,854 | 3,102 | 3,656 |
Intersegment Eliminations [Member] | Storage Solutions [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross revenues | 228 | 477 | 1,040 | 718 |
Intersegment Eliminations [Member] | Industrial [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross revenues | $ 0 | $ 1,835 | $ 144 | $ 2,722 |

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