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Segment Information Geographic Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 31, 2017 | Apr. 30, 2017 | Jan. 31, 2017 | Oct. 31, 2016 | Jul. 31, 2016 | Apr. 30, 2016 | Jan. 31, 2016 | Oct. 31, 2015 | Jul. 31, 2017 | Jul. 31, 2016 | Jul. 31, 2015
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total net revenue | $ 209,124 | $ 794,631 | $ 725,198 | $ 178,265 | $ 179,884 | $ 647,472 | $ 599,363 | $ 174,567 | $ 1,907,218 | $ 1,601,286 | $ 1,399,924
Property, Plant and Equipment, Net | 1,714,154 |  |  |  | 1,363,814 |  |  |  | 1,714,154 | 1,363,814 |
Canadian [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total net revenue |  |  |  |  |  |  |  |  | 257,800 |  |
Property, Plant and Equipment, Net | 338,800 |  |  |  |  |  |  |  | 338,800 |  |
Geographic Distribution, Foreign [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total net revenue |  |  |  |  |  |  |  |  | 328,942 | 66,570 | 24,734
Property, Plant and Equipment, Net | 453,933 |  |  |  | 115,977 |  |  |  | 453,933 | 115,977 |
Geographic Distribution, Domestic [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total net revenue |  |  |  |  |  |  |  |  | 1,578,276 | 1,534,716 | $ 1,375,190
Property, Plant and Equipment, Net | $ 1,260,220 |  |  |  | $ 1,247,838 |  |  |  | $ 1,260,220 | $ 1,247,838 |

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