Quarterly report pursuant to Section 13 or 15(d)

Subsequent event (Details)

v3.19.1
Subsequent event (Details) - USD ($)
$ / shares in Units, $ in Thousands
6 Months Ended
May 31, 2019
Apr. 05, 2019
Mar. 31, 2019
Mar. 31, 2018
Subsequent Event [Line Items]        
Payments of ordinary dividends     $ 31,983 $ 5,865
Scenario, Forecast        
Subsequent Event [Line Items]        
Payments of ordinary dividends $ 16,000      
Subsequent Event        
Subsequent Event [Line Items]        
Dividend declared date   Apr. 05, 2019    
Cash dividend declared (in dollars per share)   $ 0.25    
Dividends payable date May 31, 2019      
Dividends payable date of record May 15, 2019