GOODWILL AND INTANGIBLE ASSETS Schedule of amortization expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2020	Jan. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 6,911	$ 7,791	$ 14,188	$ 15,890
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	5,197	5,996	10,764	12,420
Trademarks and Trade Names
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 1,714	$ 1,795	$ 3,424	$ 3,470