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Leases - Information Related to Our Right-of-Use Assets and Lease Liabilities (Details) - USD ($)
$ in Thousands
 3 Months Ended
Feb. 01, 2019
Apr. 30, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Cash paid for operating lease liabilities   $ 16,184
Operating lease right-of-use assets obtained in exchange for new operating lease liabilities   $ 295,950
Operating leases, Weighted Average Remaining Lease Term (in years)   6 years 1 month 6 days
Operating leases, Weighted Average Discount Rate, Percent   3.53%
Accounting Standards Update 2016-02    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Operating lease right-of-use assets obtained in exchange for new operating lease liabilities $ 279,000  
Accounting Standards Update 2016-02, Commenced Subsequent To Adoption    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Operating lease right-of-use assets obtained in exchange for new operating lease liabilities   $ 17,000