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REVENUE, DEFERRED REVENUE AND DEFERRED COMMISSIONS - Changes in Deferred Revenue (Details) - USD ($)
$ in Thousands
12 Months Ended
Jul. 31, 2018
Jul. 31, 2017
Deferred Revenue    
Beginning balance $ 369,056 $ 218,481
Additions 529,495 317,170
Revenue/commissions recognized (267,468) (172,606)
Assumed in a business combination 124 6,011
Ending balance 631,207 369,056
Deferred Commissions    
Beginning balance 73,527 49,522
Additions 150,122 101,152
Revenue/commissions recognized (109,270) (77,147)
Assumed in a business combination 0 0
Ending balance $ 114,379 73,527
Percent expected to be recognized in next year 29.00%  
Amount deferred in prior period $ 170,100 $ 101,600
Contracted revenue not recognized $ 657,100  
Percent expected to be recognized in next year 45.00%