GOODWILL AND INTANGIBLE ASSETS Schedule of amortization expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 6,535	$ 7,277
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	4,825	5,567
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 1,710	$ 1,710