Income Taxes (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Federal:
Current	$ 53,942	$ 59,848	$ 109,804
Deferred	21,019	27,779	17,094
Federal Income Tax Expense (Benefit), Continuing Operations	74,961	87,627	126,898
State:
Current	12,095	12,720	9,100
Deferred	565	702	(111)
State and Local Income Tax Expense (Benefit), Continuing Operations	12,660	13,422	8,989
International:
Current	13,333	12,508	8,820
Deferred	(22)	(299)	(203)
International Income Tax Expense (Benefit), Continuing Operations	13,311	12,209	8,617
Income tax expense (benefit), total	$ 100,932	$ 113,258	$ 144,504