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Revenue Recognition (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Aug. 31, 2019
Aug. 31, 2018
Deferred revenue $ 65,800 $ 52,900
Other long-term liabilities 3,600 1,000
Deferred subscription revenue 56,250 $ 47,417
Deferred subscription revenue previously recognized 74,700  
Remaining performance obligations $ 88,100  
Percentage of remaining performance obligations will be recognized 75.00%  
Minimum [Member]    
Receivables collection period 30 days  
Maximum [Member]    
Receivables collection period 120 days  
Direct Sales Force Commissions [Member]    
Capitalized contract cost $ 9,000  
Direct Sales Force Commissions [Member] | Other Current Assets [Member]    
Capitalized contract cost 8,300  
Direct Sales Force Commissions [Member] | Other Long-Term Liabilities [Member]    
Capitalized contract cost 700  
Obtain Revenue Contracts [Member]    
Capitalized contract cost 13,700  
Selling, General, And Administrative Expense [Member]    
Capitalized contract cost, amortized $ 11,700