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Repurchase of Common Stock - Summary of share repurpose activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Aug. 31, 2021
May 31, 2021
Aug. 31, 2020
May 31, 2020
Aug. 31, 2021
Aug. 31, 2020
Repurchase of common stock            
Aggregate value of shares $ 116 $ 110,074 $ 148 $ 10,013    
Stock Compensation Plan            
Repurchase of common stock            
Number of shares (in shares) 503   780,000   66,147 61,625,000
Aggregate value of shares $ 116   $ 148   $ 14,706 $ 10,161
Average price per share (in dollars per share) $ 229.76   $ 189.64   $ 222.32 $ 164.88
Open Market            
Repurchase of common stock            
Number of shares (in shares) 0   0   436,842 0
Aggregate value of shares $ 0   $ 0   $ 95,484 $ 0
Average price per share (in dollars per share) $ 0   $ 0   $ 218.58 $ 0