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Segment Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2015
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Gross revenues |  |  |  |  |  |  |  |  | $ 1,207,510 | $ 1,316,466 | $ 1,354,230
Less: Inter-segment revenues |  |  |  |  |  |  |  |  | 1,197,509 | 1,311,917 | 1,343,135
Revenues |  |  |  |  |  |  |  |  | 1,197,509 | 1,311,917 | 1,343,135
Gross profit | $ 23,127 | $ (2,614) | $ 28,212 | $ 32,278 | $ 34,099 | $ 27,303 | $ 30,005 | $ 34,584 | 81,003 | 125,991 | 87,370
Operating income (loss) | 3,531 | $ (21,210) | $ 8,237 | $ 14,301 | 14,499 | $ 6,347 | $ 4,935 | $ 15,101 | 4,859 | 40,882 | 8,802
Segment assets | 586,030 |  |  |  | 564,967 |  |  |  | 586,030 | 564,967 | 561,689
Capital expenditures |  |  |  |  |  |  |  |  | 11,908 | 13,939 | 15,773
Depreciation and amortization |  |  |  |  |  |  |  |  | 21,602 | 21,441 | 23,480
Electrical Infrastructure [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Gross revenues |  |  |  |  |  |  |  |  | 373,384 | 349,011 | 257,930
Less: Inter-segment revenues |  |  |  |  |  |  |  |  | 373,384 | 349,011 | 257,930
Revenues |  |  |  |  |  |  |  |  | 373,384 | 349,011 | 257,930
Gross profit |  |  |  |  |  |  |  |  | 7,137 | 29,301 | (31,444)
Operating income (loss) |  |  |  |  |  |  |  |  | (8,309) | 11,144 | (44,293)
Segment assets | 183,351 |  |  |  | 135,298 |  |  |  | 183,351 | 135,298 | 129,725
Capital expenditures |  |  |  |  |  |  |  |  | 1,390 | 1,611 | 579
Depreciation and amortization |  |  |  |  |  |  |  |  | 5,198 | 5,008 | 4,915
Oil Gas & Chemical [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Gross revenues |  |  |  |  |  |  |  |  | 247,423 | 252,973 | 310,826
Less: Inter-segment revenues |  |  |  |  |  |  |  |  | 240,523 | 249,795 | 305,360
Revenues |  |  |  |  |  |  |  |  | 240,523 | 249,795 | 305,360
Gross profit |  |  |  |  |  |  |  |  | 12,675 | 18,553 | 25,394
Operating income (loss) |  |  |  |  |  |  |  |  | (8,783) | (3,503) | 7,064
Segment assets | 129,177 |  |  |  | 91,350 |  |  |  | 129,177 | 91,350 | 108,960
Capital expenditures |  |  |  |  |  |  |  |  | 829 | 1,481 | 3,858
Depreciation and amortization |  |  |  |  |  |  |  |  | 6,299 | 4,811 | 4,772
Storage Solutions [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Gross revenues |  |  |  |  |  |  |  |  | 483,254 | 564,738 | 504,155
Less: Inter-segment revenues |  |  |  |  |  |  |  |  | 481,696 | 563,512 | 503,123
Revenues |  |  |  |  |  |  |  |  | 481,696 | 563,512 | 503,123
Gross profit |  |  |  |  |  |  |  |  | 55,651 | 67,843 | 58,085
Operating income (loss) |  |  |  |  |  |  |  |  | 22,928 | 33,449 | 29,069
Segment assets | 166,742 |  |  |  | 201,875 |  |  |  | 166,742 | 201,875 | 172,857
Capital expenditures |  |  |  |  |  |  |  |  | 2,017 | 3,882 | 2,396
Depreciation and amortization |  |  |  |  |  |  |  |  | 7,277 | 8,124 | 7,298
Industrial [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Gross revenues |  |  |  |  |  |  |  |  | 103,449 | 149,744 | 281,319
Less: Inter-segment revenues |  |  |  |  |  |  |  |  | 101,906 | 149,599 | 276,722
Revenues |  |  |  |  |  |  |  |  | 101,906 | 149,599 | 276,722
Gross profit |  |  |  |  |  |  |  |  | 5,540 | 10,294 | 35,335
Operating income (loss) |  |  |  |  |  |  |  |  | (977) | (208) | 16,962
Segment assets | 53,754 |  |  |  | 67,569 |  |  |  | 53,754 | 67,569 | 102,761
Capital expenditures |  |  |  |  |  |  |  |  | 38 | 104 | 1,139
Depreciation and amortization |  |  |  |  |  |  |  |  | 2,828 | 3,498 | 6,495
Unallocated Corporate [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Segment assets | $ 53,006 |  |  |  | $ 68,875 |  |  |  | 53,006 | 68,875 | 47,386
Capital expenditures |  |  |  |  |  |  |  |  | 7,634 | 6,861 | 7,801
Intersegment Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Less: Inter-segment revenues |  |  |  |  |  |  |  |  | 10,001 | 4,549 | 11,095
Revenues |  |  |  |  |  |  |  |  | 10,001 | 4,549 | 11,095
Intersegment Eliminations [Member] | Electrical Infrastructure [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Less: Inter-segment revenues |  |  |  |  |  |  |  |  | 0 | 0 | 0
Revenues |  |  |  |  |  |  |  |  | 0 | 0 | 0
Intersegment Eliminations [Member] | Oil Gas & Chemical [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Less: Inter-segment revenues |  |  |  |  |  |  |  |  | 6,900 | 3,178 | 5,466
Revenues |  |  |  |  |  |  |  |  | 6,900 | 3,178 | 5,466
Intersegment Eliminations [Member] | Storage Solutions [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Less: Inter-segment revenues |  |  |  |  |  |  |  |  | 1,558 | 1,226 | 1,032
Revenues |  |  |  |  |  |  |  |  | 1,558 | 1,226 | 1,032
Intersegment Eliminations [Member] | Industrial [Member] |  |  |  |  |  |  |  |  |  |  |
Results of Operations |  |  |  |  |  |  |  |  |  |  |
Less: Inter-segment revenues |  |  |  |  |  |  |  |  | 1,543 | 145 | 4,597
Revenues |  |  |  |  |  |  |  |  | $ 1,543 | $ 145 | $ 4,597

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