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LEASES - Lease Costs (Details) - USD ($)
$ in Thousands
3 Months Ended
Oct. 31, 2021
Oct. 31, 2020
Lease, Cost [Abstract]    
Operating lease cost $ 4,001 $ 4,228
Short-term lease expense 349 407
Variable lease cost 11 8
Interest on finance lease liabilities 1 2
Total lease cost $ 4,362 $ 4,645