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Restructuring and Impairment Charges - Schedule of Restructuring Costs (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Nov. 30, 2020
Nov. 30, 2019
Nov. 30, 2020
Nov. 30, 2019
Restructuring Cost and Reserve [Line Items]        
Write down on assets held for sale to estimated sales price     $ 7,030  
Write down of assets expected to be abandoned     6,922  
Loss on sale of subsidiaries     3,050 $ 0
Write down of excess inventory     2,511  
Costs associated with assets held for sale     756  
Total charges $ 1,576 $ 0 20,269 $ 0
Metal Coatings        
Restructuring Cost and Reserve [Line Items]        
Write down on assets held for sale to estimated sales price     2,956  
Write down of excess inventory     336  
Metal Coatings | Operating Segments        
Restructuring Cost and Reserve [Line Items]        
Write down on assets held for sale to estimated sales price     2,930  
Write down of assets expected to be abandoned     6,922  
Loss on sale of subsidiaries     1,191  
Write down of excess inventory     0  
Costs associated with assets held for sale     0  
Total charges     11,043  
Infrastructure Solutions | Operating Segments        
Restructuring Cost and Reserve [Line Items]        
Write down on 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     756  
Total charges     $ 9,226