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Subsequent Event (Details) - $ / shares
3 Months Ended
Jul. 31, 2019
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2018
Mar. 31, 2018
Subsequent Event [Line Items]          
Common stock, dividends per share, declared   $ 0.06 $ 0.06 $ 0.06 $ 0.06
Subsequent Event | Common Stock          
Subsequent Event [Line Items]          
Common stock, dividends per share, declared $ 0.06        
Dividends Payable, Date to be Paid Sep. 18, 2019        
Dividends Payable, Date of Record Aug. 23, 2019