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Summary of Significant Accounting Policies Significant Accounting Policies - Additional Information (Details) - USD ($)
$ in Thousands
5 Months Ended 12 Months Ended
Jan. 31, 2016
Jan. 31, 2017
Jan. 31, 2016
Jan. 31, 2015
Significant Accounting Policies        
Finance Fee Percentage of Revenue   2.00% 2.00% 2.00%
Capitalized Computer Software, Additions   $ 0 $ 0 $ 0
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests     182  
Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions 100.00%      
Non Controlling Interest With Redemption Feature        
Significant Accounting Policies        
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests     $ 11,088  
Building        
Significant Accounting Policies        
Property, plant and equipment, useful life   40 years    
Land Improvements        
Significant Accounting Policies        
Property, plant and equipment, useful life   20 years    
Office Equipment | Minimum        
Significant Accounting Policies        
Property, plant and equipment, useful life   3 years    
Office Equipment | Maximum        
Significant Accounting Policies        
Property, plant and equipment, useful life   5 years    
Leasehold Improvements | Minimum        
Significant Accounting Policies        
Property, plant and equipment, useful life   3 years    
Leasehold Improvements | Maximum        
Significant Accounting Policies        
Property, plant and equipment, useful life   10 years    
Purchased Technology | Minimum        
Significant Accounting Policies        
Finite-Lived intangible asset, useful life   3 years    
Purchased Technology | Maximum        
Significant Accounting Policies        
Finite-Lived intangible asset, useful life   5 years    
Other Intangible Assets | Minimum        
Significant Accounting Policies        
Finite-Lived intangible asset, useful life   2 years    
Other Intangible Assets | Maximum        
Significant Accounting Policies        
Finite-Lived intangible asset, useful life   6 years    
Frontline        
Significant Accounting Policies        
Equity method investment, ownership percentage   50.00%