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CHANGES IN BUSINESS (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
May 31, 2020 USD ($) | Oct. 31, 2019 USD ($) | May 31, 2019 USD ($) | May 31, 2018 USD ($) | May 31, 2019 USD ($) | May 31, 2018 USD ($) | Nov. 05, 2018 USD ($) mini_mill fabrication_facility
Business Combinations [Abstract] |  |  |  |  |  |  |
Number of rebar fabrication facilities acquired | fabrication_facility |  |  |  |  |  |  | 33
Number of electric arc furnace mini mills | mini_mill |  |  |  |  |  |  | 4
Cash purchase price |  |  |  |  |  |  | $ 701,200
Pro forma net sales |  |  | $ 1,582,478 | $ 1,648,962 | $ 4,507,485 | $ 4,560,929 |
Pro forma net earnings (loss) |  |  | $ 63,018 | $ 49,402 | $ 88,987 | 40,311 |
Non-recurring acquisition and integration costs |  |  |  |  |  | $ 49,800 |
Facility closure costs | $ 4,800 | $ 7,200 |  |  |  |  |

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