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LEASES LEASES - SUPPLEMENTAL BALANCE SHEET INFO (Details) - USD ($)
$ in Thousands
Jul. 31, 2019
Jan. 31, 2019
Lessee, Finance Lease, Description [Abstract]    
Finance Lease, Liability, Noncurrent $ 0  
Finance lease liabilities 5,009  
Lessee, Operating Lease, Description [Abstract]    
Operating lease liabilities - long-term 93,137 $ 0
Operating lease liabilities 114,092  
Accrued expenses and other current liabilities    
Lessee, Finance Lease, Description [Abstract]    
Finance Lease, Liability, Current 1,563  
Lessee, Operating Lease, Description [Abstract]    
Operating lease liability - current 20,955  
Other liabilities    
Lessee, Finance Lease, Description [Abstract]    
Finance Lease, Liability, Noncurrent 3,446  
Lessee, Operating Lease, Description [Abstract]    
Operating lease liabilities - long-term $ 0