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Segment Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2014
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 1,311,917 | $ 1,343,135 | $ 1,263,089
Less: Inter-segment revenues |  |  |  |  |  |  |  |  | 1,311,917 | 1,343,135 | 1,263,089
Gross profit | $ 34,099 | $ 27,303 | $ 30,005 | $ 34,584 | $ 40,404 | $ 2,632 | $ 15,955 | $ 28,379 | 125,991 | 87,370 | 136,473
Operating income (loss) | 14,499 | $ 6,347 | $ 4,935 | $ 15,101 | 18,374 | $ (14,448) | $ (3,671) | $ 8,547 | 40,882 | 8,802 | 58,607
Segment assets | 564,967 |  |  |  | 561,689 |  |  |  | 564,967 | 561,689 | 568,932
Capital expenditures |  |  |  |  |  |  |  |  | 13,939 | 15,773 | 23,589
Depreciation and amortization |  |  |  |  |  |  |  |  | 21,441 | 23,480 | 18,518
Electrical Infrastructure [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 349,011 | 257,930 | 205,570
Less: Inter-segment revenues |  |  |  |  |  |  |  |  | 349,011 | 257,930 | 205,570
Gross profit |  |  |  |  |  |  |  |  | 29,301 | (31,444) | 20,629
Operating income (loss) |  |  |  |  |  |  |  |  | 11,144 | (44,293) | 7,703
Segment assets | 135,298 |  |  |  | 129,725 |  |  |  | 135,298 | 129,725 | 120,264
Capital expenditures |  |  |  |  |  |  |  |  | 1,611 | 579 | 9,055
Depreciation and amortization |  |  |  |  |  |  |  |  | 5,008 | 4,915 | 3,292
Oil Gas & Chemical [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 249,795 | 305,360 | 239,690
Less: Inter-segment revenues |  |  |  |  |  |  |  |  | 249,795 | 305,360 | 239,690
Gross profit |  |  |  |  |  |  |  |  | 18,553 | 25,394 | 26,912
Operating income (loss) |  |  |  |  |  |  |  |  | (3,503) | 7,064 | 9,939
Segment assets | 91,350 |  |  |  | 108,960 |  |  |  | 91,350 | 108,960 | 72,406
Capital expenditures |  |  |  |  |  |  |  |  | 1,481 | 3,858 | 5,421
Depreciation and amortization |  |  |  |  |  |  |  |  | 4,811 | 4,772 | 3,768
Storage Solutions [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Gross profit |  |  |  |  |  |  |  |  | 67,843 | 58,085 | 68,448
Operating income (loss) |  |  |  |  |  |  |  |  | 33,449 | 29,069 | 34,310
Segment assets | 201,875 |  |  |  | 172,857 |  |  |  | 201,875 | 172,857 | 200,493
Capital expenditures |  |  |  |  |  |  |  |  | 3,882 | 2,396 | 2,519
Depreciation and amortization |  |  |  |  |  |  |  |  | 8,124 | 7,298 | 7,707
Industrial [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Gross profit |  |  |  |  |  |  |  |  | 10,294 | 35,335 | 20,484
Operating income (loss) |  |  |  |  |  |  |  |  | (208) | 16,962 | 6,655
Segment assets | 67,569 |  |  |  | 102,761 |  |  |  | 67,569 | 102,761 | 105,049
Capital expenditures |  |  |  |  |  |  |  |  | 104 | 1,139 | 1,157
Depreciation and amortization |  |  |  |  |  |  |  |  | 3,498 | 6,495 | 3,751
Unallocated Corporate [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Segment assets | $ 68,875 |  |  |  | $ 47,386 |  |  |  | 68,875 | 47,386 | 70,720
Capital expenditures |  |  |  |  |  |  |  |  | 6,861 | 7,801 | 5,437
Gross [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 1,316,466 | 1,354,230 | 1,264,460
Less: Inter-segment revenues |  |  |  |  |  |  |  |  | 1,316,466 | 1,354,230 | 1,264,460
Gross [Member] | Electrical Infrastructure [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 349,011 | 257,930 | 205,570
Less: Inter-segment revenues |  |  |  |  |  |  |  |  | 349,011 | 257,930 | 205,570
Gross [Member] | Oil Gas & Chemical [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 252,973 | 310,826 | 240,131
Less: Inter-segment revenues |  |  |  |  |  |  |  |  | 252,973 | 310,826 | 240,131
Gross [Member] | Storage Solutions [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 564,738 | 504,155 | 611,826
Less: Inter-segment revenues |  |  |  |  |  |  |  |  | 564,738 | 504,155 | 611,826
Gross [Member] | Industrial [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 149,744 | 281,319 | 206,933
Less: Inter-segment revenues |  |  |  |  |  |  |  |  | 149,744 | 281,319 | 206,933
Industrial [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 149,599 | 276,722 | 206,933
Less: Inter-segment revenues |  |  |  |  |  |  |  |  | 149,599 | 276,722 | 206,933
Storage Solutions [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 563,512 | 503,123 | 610,896
Less: Inter-segment revenues |  |  |  |  |  |  |  |  | 563,512 | 503,123 | 610,896
Intersegment Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 4,549 | 11,095 | 1,371
Less: Inter-segment revenues |  |  |  |  |  |  |  |  | 4,549 | 11,095 | 1,371
Intersegment Eliminations [Member] | Electrical Infrastructure [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 0 | 0 | 0
Less: Inter-segment revenues |  |  |  |  |  |  |  |  | 0 | 0 | 0
Intersegment Eliminations [Member] | Oil Gas & Chemical [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 3,178 | 5,466 | 441
Less: Inter-segment revenues |  |  |  |  |  |  |  |  | 3,178 | 5,466 | 441
Intersegment Eliminations [Member] | Storage Solutions [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 1,226 | 1,032 | 930
Less: Inter-segment revenues |  |  |  |  |  |  |  |  | 1,226 | 1,032 | 930
Intersegment Eliminations [Member] | Industrial [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 145 | 4,597 | 0
Less: Inter-segment revenues |  |  |  |  |  |  |  |  | $ 145 | $ 4,597 | $ 0

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