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Discontinued Operations - Discontinued Operations in Consolidated Statements of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2022 | Feb. 28, 2023 | Feb. 28, 2023 | Feb. 28, 2022 | Feb. 28, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Net income (loss) from discontinued operations |  | $ (119,313) | $ (119,313) | $ 34,205 | $ 12,431
Earnings per common share from discontinued operations: |  |  |  |  |
Earnings (loss) per common share from discontinued operations (in dollars per share) |  | $ (4.81) | $ (4.81) | $ 1.38 | $ 0.48
Earnings (loss) per common share from discontinued operations (in dollars per share) |  | $ (4.78) | $ (4.78) | $ 1.36 | $ 0.48
Discontinued Operations, Disposed of by Sale | AZZ Infrastructure Solutions |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Sales |  |  | $ 256,224 | $ 377,066 | $ 358,343
Cost of sales |  |  | 202,707 | 297,996 | 292,496
Gross margin |  |  | 53,517 | 79,070 | 65,847
Restructuring and impairment charges |  |  | 0 | (1,797) | 3,894
Selling, general and administrative |  |  | 26,186 | 46,747 | 47,817
Loss on disposal | $ 159,900 |  | 159,910 | 0 | 0
Operating income (loss) from discontinued operations |  |  | (132,579) | 34,120 | 14,136
Interest expense |  |  | 8 | 32 | 187
Other (income) expense, net |  |  | 6,270 | 774 | 1,383
Income (loss) from discontinued operations before income tax |  |  | (138,857) | 33,314 | 12,566
Income tax (benefit) expense |  |  | (19,544) | (891) | 135
Net income (loss) from discontinued operations |  |  | $ (119,313) | $ 34,205 | $ 12,431
Earnings per common share from discontinued operations: |  |  |  |  |
Earnings (loss) per common share from discontinued operations (in dollars per share) |  |  | $ (4.81) | $ 1.38 | $ 0.48
Earnings (loss) per common share from discontinued operations (in dollars per share) |  |  | $ (4.78) | $ 1.36 | $ 0.48

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