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Share-Based Compensation Plans (Details)
$ / shares in Units, $ in Thousands
3 Months Ended
May 31, 2021
USD ($)
$ / shares
shares
Share-based compensation plans  
Expected recognition period for unrecognized share-based compensation 2 years 6 months
Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other Than Options, Target Achievement, As A Percentage 200.00%
Restricted Stock  
Share-based compensation plans  
Number of awards granted (in shares) 143,340
Unrecognized share-based compensation | $ $ 47,400
Service Condition Awards  
Share-based compensation plans  
Number of awards granted (in shares) 83,227
Grant date fair value of shares granted in period (in dollars per share) | $ / shares $ 219.02
Market Condition Awards  
Share-based compensation plans  
Number of awards granted (in shares) 71,670
Grant date fair value of shares granted in period (in dollars per share) | $ / shares $ 156.08
Performance Condition Awards  
Share-based compensation plans  
Number of awards granted (in shares) 71,670
Grant date fair value of shares granted in period (in dollars per share) | $ / shares $ 216.20