v3.7.0.1
Accounting Standards and Significant Accounting Policies - Adjustments to the Income Statement (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Apr. 30, 2017
Apr. 30, 2016
Revenues [Abstract]    
Subscription services $ 399,736 $ 280,168 [1]
Professional services 80,125 67,509 [1]
Total revenues 479,861 347,677 [1]
Costs and expenses:    
Sales and marketing [2] 155,709 127,619 [1]
Operating Income (Loss) (60,200) (71,530) [1]
Net loss $ (64,044) $ (78,503) [1]
Net loss per share, basic and diluted (in dollars per share) $ (0.31) $ (0.40) [1]
As previously reported    
Revenues [Abstract]    
Subscription services   $ 280,003
Professional services   65,427
Total revenues   345,430
Costs and expenses:    
Sales and marketing   127,491
Operating Income (Loss)   (73,649)
Net loss   $ (80,622)
Net loss per share, basic and diluted (in dollars per share)   $ (0.41)
Adjustments | Adjustments    
Revenues [Abstract]    
Subscription services   $ 165
Professional services   2,082
Total revenues   2,247
Costs and expenses:    
Sales and marketing   128
Operating Income (Loss)   2,119
Net loss   $ 2,119
Net loss per share, basic and diluted (in dollars per share)   $ 0.01
[1] See Note 2 for a summary of adjustments.
[2] Costs and expenses include share-based compensation expense as follows: Costs of subscription services $5,691 $4,397 Costs of professional services $8,021 $5,293 Product development $51,029 $32,968 Sales and marketing $23,159 $19,002 General and administrative $19,888 $16,575