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SIGNIFICANT ACCOUNTING POLICIES - Effects of Recently Adopted and Issued Accounting Pronouncements (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 31, 2021
Jan. 31, 2020
Accounting Policies [Abstract]    
Operating lease liabilities $ 205,228 $ 312,206
Operating lease assets 186,070 270,032
Impairment of the operating lease assets, net of tax $ 19,400 $ 9,900