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Consolidated Statements of Operations (Parenthetical) - USD ($)
$ in Thousands
12 Months Ended
Jan. 31, 2016
Jan. 31, 2015
Jan. 31, 2014
Costs of subscription services      
Allocated share-based compensation expense $ 12,060 $ 6,053 $ 2,408
Costs of professional services      
Allocated share-based compensation expense 19,526 12,890 4,818
Product development      
Allocated share-based compensation expense 109,362 63,938 21,644
Sales and marketing      
Allocated share-based compensation expense 51,617 29,875 12,131
General and administrative      
Allocated share-based compensation expense $ 57,405 $ 43,292 $ 20,850