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Leases - Components of Lease Expense (Details) - USD ($)
$ in Thousands
6 Months Ended
Jul. 31, 2021
Jul. 31, 2020
Leases [Abstract]    
Operating lease expense $ 8,502 $ 10,944
Short-term lease expense 379 784
Variable lease expense 4,408 1,338
Total lease expense $ 13,289 $ 13,066