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Share-Based Compensation Plans Share Based Compensation Expense in SG&A (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Aug. 31, 2021
Aug. 31, 2020
Aug. 31, 2021
Aug. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Share-based compensation expense, net of tax $ 7,068 $ 4,227 $ 20,229 $ 12,912
SG&A        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Share-based compensation expense 7,780 4,624 21,800 13,915
Less income tax benefits (712) (397) (1,571) (1,003)
Stock options | SG&A        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Share-based compensation expense 0 3 0 15
Service Condition Awards | SG&A        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Share-based compensation expense 3,296 1,664 5,236 3,584
Performance Condition Awards | SG&A        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Share-based compensation expense 3,061 2,775 13,084 9,466
Market Condition Awards | SG&A        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Share-based compensation expense 1,260 0 2,389 0
Employee stock purchase plan | SG&A        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Share-based compensation expense 0 0 768 486
Directors stock compensation | SG&A        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Share-based compensation expense $ 163 $ 182 $ 323 $ 364