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Restructuring and Impairment Charges (Details) - USD ($) $ in Thousands | 1 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Feb. 29, 2020 | Nov. 30, 2020 | Feb. 28, 2022 | Feb. 28, 2021 | Feb. 29, 2020
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and impairment charges |  |  | $ (1,797) | $ 19,999 | $ 18,632
Other |  |  | (477) | (1,693) |
Loss on disposal of business |  |  | 552 | 3,080 | 18,632
Impairment charges |  |  |  |  | 9,200
Assets held for sale |  |  | 235 | 235 |
Cost of sales |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Impairment charges |  |  |  |  | 2,000
Selling, general and administrative |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Impairment charges |  |  |  |  | $ 7,200
Operating Segments | Infrastructure Solutions |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and impairment charges |  |  |  | 9,203 |
Other |  |  | $ 0 | (1,693) |
Loss on disposal of business |  |  |  | 1,859 |
Operating Segments | Infrastructure Solutions | Other Restructuring [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and impairment charges |  |  |  | 3,900 |
Galvabar |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Proceeds from sale of subsidiaries, net |  |  |  | 8,300 |
Loss on disposal of business |  |  |  | 1,200 |
Southern Mechanical Services |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Proceeds from sale of subsidiaries, net |  |  |  | 4,100 |
Loss on disposal of business |  | $ 1,900 |  |  |
Intangible impairment |  |  |  | $ 900 |
Nuclear Logistics Business [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Proceeds from sale of subsidiaries, net | $ 23,600 |  |  |  |
Loss on disposal of business | $ 18,600 |  |  |  |

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