ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES - Components of Accrued Expenses (Detail) - USD ($) $ in Thousands	Apr. 30, 2019	Jul. 31, 2018
Payables and Accruals [Abstract]
Accrued sales taxes	$ 21,790	$ 21,390
Accrued other taxes	6,432	8,414
Accrued compensation	20,113	25,603
Accrued interest	287	1,437
Accrued audit, tax and legal	3,747	3,264
Accrued contract labor	1,613	1,932
Accrued worker's compensation	5,078	6,126
Accrued other	18,653	20,260
Accrued expenses	$ 77,713	$ 88,426