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Restructuring and Impairment Charges - Schedule of Restructuring Costs (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Feb. 28, 2021
Feb. 28, 2021
Feb. 29, 2020
Feb. 28, 2019
Restructuring Cost and Reserve [Line Items]        
Write down of assets held for sale to estimated sales price   $ 6,752    
Write down of assets expected to be abandoned   6,923    
Loss on sale of subsidiaries $ 18,600 3,080 $ 18,632 $ 0
Write down of excess inventory   2,511 0 0
Costs associated with assets held for sale   733    
Total charges   19,999 $ 18,632 $ 0
Metal Coatings | Operating Segments        
Restructuring Cost and Reserve [Line Items]        
Write down of assets held for sale to estimated sales price   2,652    
Write down of assets expected to be abandoned   6,923    
Loss on sale of subsidiaries   1,221    
Write down of excess inventory   0    
Costs associated with assets held for sale   0    
Total charges   10,796    
Infrastructure Solutions | Operating Segments        
Restructuring Cost and Reserve [Line Items]        
Write down of assets held for sale to estimated sales price   4,100    
Write down of assets expected to be abandoned   0    
Loss on sale of subsidiaries   1,859    
Write down of excess inventory   2,511    
Costs associated with assets held for sale   733    
Total charges   $ 9,203