Stock-based Compensation - Company RSA's and RSU's (Details) shares in Thousands	3 Months Ended
	Oct. 31, 2021 $ / shares shares
Restricted Shares
Outstanding, beginning balance (in shares) | shares	102
Grants of restricted stock (in shares) | shares	39
Vested restricted stock (in shares) | shares	(5)
Forfeited restricted stock (in shares) | shares	(3)
Outstanding, ending balance (in shares) | shares	133
Weighted Average Grant Date Fair Value
Outstanding, beginning balance (in dollars per share) | $ / shares	$ 90.46
Grants (in dollars per share) | $ / shares	143.88
Vested (in dollars per share) | $ / shares	70.68
Forfeited (in dollars per share) | $ / shares	109.77
Outstanding, ending balance (in dollars per share) | $ / shares	$ 106.74