Schedule of Fair Value, Assets Measured on Recurring Basis (Detail) - USD ($) $ in Thousands	Apr. 30, 2019	Jul. 31, 2018
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	$ 166,606	$ 230,319
Restricted cash	25,801
Deferred compensation plan assets and liabilities	51,318	43,316
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency forward contract liabilities	820
Interest rate swap liability	$ 4,873	$ 0