Share Repurchase Program (Details) - USD ($) $ in Thousands	9 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Mar. 07, 2023	Jul. 31, 2022	Dec. 04, 2015	Jul. 16, 2008	Mar. 09, 2006
Accelerated Share Repurchases [Line Items]
Number of shares authorized to repurchase	10,000,000						3,000,000
Additional number of shares authorized to repurchase			2,500,000		1,500,000	3,000,000
Number of shares repurchased since inception	8,243,438	6,306,000		6,466,000
Value of stock repurchased since inception	$ 879,400
Remaining shares available for repurchase under existing program	1,756,562
Treasury Stock, Shares, Acquired	1,777,730	144,875
Payments for Repurchase of Common Stock	$ 400,000	$ 37,503
Sales and Excise Tax Payable	$ 3,900