ACQUISITIONS - Erwin Hymer - Pro Forma Information (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Jul. 31, 2019 USD ($) $ / shares
Business Combinations [Abstract]
Net sales | $	$ 9,067,750
Net income | $	$ 143,517
Basic earnings per common share (in dollars per share) | $ / shares	$ 2.66
Diluted earnings per common share (in dollars per share) | $ / shares	$ 2.66