Income Taxes (Details Textuals) - USD ($) $ in Thousands	3 Months Ended		5 Months Ended	12 Months Ended
	Jan. 31, 2019	Jul. 31, 2018	Dec. 31, 2017	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Amount				$ 15,100	$ 8,200
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Income Tax Expense	$ 1,100	$ 12,400
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability		4,300
Valuation allowance				15,429	8,578
Unrecognized tax benefits that would impact effective tax rate				29,000	22,000
Interest and penalties related to income tax		$ 6,000		8,900	$ 7,600	$ 6,000
Undistributed Earnings of Foreign Subsidiaries				$ 163,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			35.00%	21.00%	21.00%	26.90%
Effective Income Tax Rate Reconciliation, Percent				12.60%	16.10%	25.70%
Tax Adjustments, Settlements, and Unusual Provisions				$ 1,700	$ 10,200
Share-based Payment Arrangement, Expense, Tax Benefit				$ 92,500	$ 46,100	$ 21,300