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Accounting Standards - Recently Adopted Accounting Pronouncements (Details) - USD ($)
$ in Thousands
Apr. 30, 2019
Feb. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Operating lease right-of-use assets $ 280,145  
Operating lease liabilities $ 310,144  
Accounting Standards Update 2016-02    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Operating lease right-of-use assets   $ 279,000
Operating lease liabilities   307,000
Deferred rent obligation and lease incentives   28,000
Accumulated Deficit | Accounting Standards Update 2018-07    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Cumulative effect of new accounting principle in period of adoption   $ 400