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Subsequent Events (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Jun. 18, 2019
Jun. 14, 2019
May 31, 2019
May 31, 2018
May 31, 2019
May 31, 2018
Subsequent Events [Line Items]            
Dividend payable, declared date         Jun. 18, 2019  
Dividends payable, date to be paid         Jul. 31, 2019  
Dividend payable, record date         Jul. 19, 2019  
Provision for income taxes     $ 4,478 $ 5,167 $ 10,983 $ 12,491
Subsequent Events [Member]            
Subsequent Events [Line Items]            
Cash dividend declared $ 0.61          
Minimum [Member] | Subsequent Events [Member]            
Subsequent Events [Line Items]            
Provision for income taxes   $ 5,000        
Maximum [Member] | Subsequent Events [Member]            
Subsequent Events [Line Items]            
Provision for income taxes   $ 7,000