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Subsequent Event (Details) - $ / shares
Jul. 26, 2017
Jun. 16, 2017
Mar. 17, 2017
Subsequent event      
Quarterly cash dividend declared (in dollars per share)   $ 0.135 $ 0.135
Dividends payable date of record   May 26, 2017 Feb. 24, 2017
Subsequent event      
Subsequent event      
Dividends payable date declared Jul. 26, 2017    
Quarterly cash dividend declared (in dollars per share) $ 0.135    
Dividends payable date to be paid Sep. 15, 2017    
Dividends payable date of record Aug. 25, 2017