Stock-Based Compensation (Status for Performance-Based Awards Which Contain Vesting Provisions) (Details) - Performance shares - $ / shares	12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020
Performance Shares
Beginning Balance (in shares)	200,567
Granted (in shares)	88,400
Vested (in shares)	(97,181)
Forfeited (in shares)	(3,580)
Ending Balance (in shares)	188,206	200,567
Weighted Average Grant Date Fair Value
Beginning Balance (in dollars per share)	$ 48.76
Granted (in dollars per share)	59.40	$ 46.06	$ 51.61
Vested (in dollars per share)	51.61
Forfeited (in dollars per share)	53.23
Ending Balance (in dollars per share)	$ 52.20	$ 48.76