INCOME TAXES - Earnings Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Income Tax Disclosure [Abstract]
United States	$ 258,483	$ 200,859	$ 633,029
Foreign	14,413	(16,193)	0
Income before income taxes	$ 272,896	$ 184,666	$ 633,029