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Stock-based Compensation - Company RSA's and RSU's (Details)
shares in Thousands
 6 Months Ended
Jan. 31, 2022
$ / shares
shares
Restricted Shares  
Outstanding, beginning balance (in shares) | shares 102
Grants of restricted stock (in shares) | shares 66
Vested restricted stock (in shares) | shares (13)
Forfeited restricted stock (in shares) | shares (7)
Outstanding, ending balance (in shares) | shares 148
Weighted Average Grant Date Fair Value  
Outstanding, beginning balance (in dollars per share) | $ / shares $ 90.46
Grants (in dollars per share) | $ / shares 143.24
Vested (in dollars per share) | $ / shares 66.16
Forfeited (in dollars per share) | $ / shares 115.40
Outstanding, ending balance (in dollars per share) | $ / shares $ 115.24