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Description of Business and Basis of Presentation - Schedule of Adjustments made to Account on Condensed Consolidated Balance Sheet as a Result of Applying Retrospective Method (Details) - USD ($)
$ in Thousands
Apr. 30, 2018
Feb. 01, 2018
Jan. 31, 2018
Organization Consolidation And Presentation Of Financial Statements [Line Items]      
Accounts receivable [1] $ 91,025   $ 162,133
Deferred commission 15,091   17,589
Deferred commission, non-current 41,275   8,330 [2]
Deferred revenue 264,427   291,902
Deferred revenue, non-current 22,522   29,021
Accumulated deficit $ (1,035,923)   $ (1,039,088)
Accounting Standards Update 2014-09      
Organization Consolidation And Presentation Of Financial Statements [Line Items]      
Accounts receivable [1]   $ 162,715  
Deferred commission   14,140  
Deferred commission, non-current [2]   41,185  
Deferred revenue   283,419  
Deferred revenue, non-current   27,690  
Accumulated deficit   (999,286)  
Accounting Standards Update 2014-09 | Effect of Adoption of ASU Topic 606 | Revenue Recognition      
Organization Consolidation And Presentation Of Financial Statements [Line Items]      
Accounts receivable [1]   582  
Deferred revenue   (8,483)  
Deferred revenue, non-current   (1,331)  
Accumulated deficit   10,396  
Accounting Standards Update 2014-09 | Effect of Adoption of ASU Topic 606 | Incremental Costs of Obtaining a Contract      
Organization Consolidation And Presentation Of Financial Statements [Line Items]      
Deferred commission   (3,449)  
Deferred commission, non-current [2]   32,855  
Accumulated deficit   $ 29,406  
[1] Contract assets are reported as part of accounts receivable upon our adoption of ASC Topic 606.
[2] As of January 31, 2018, deferred commission, non-current was reported as part of other long-term assets. The condensed consolidated balance sheet as of January 31, 2018 was reclassified to conform to the current period presentation.