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DEBT - Net Carrying Value of the Notes (Detail) - USD ($)
Apr. 30, 2020
Jul. 31, 2019
Feb. 28, 2019
Debt Instrument [Line Items]      
Carrying amount of equity component $ 8,200,000 $ 8,200,000  
Unamortized debt discount (6,268,000) (7,508,000)  
Net carrying value of the term loan 379,627,000 381,669,000  
SPHG Holdings | 7.50% Convertible Senior Debt      
Debt Instrument [Line Items]      
Principal amount 14,940,000 14,940,000 $ 14,940,000
SPHG Holdings | Convertible Senior Note      
Debt Instrument [Line Items]      
Unamortized debt discount (6,268,000) (7,508,000)  
Net carrying value of the term loan $ 8,672,000 $ 7,432,000