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Earnings Per Share and Certain Related Information - Dividends (Details) - $ / shares
Jan. 16, 2020
Nov. 01, 2019
Sep. 19, 2019
Aug. 23, 2019
Jul. 11, 2019
Jun. 14, 2019
May 02, 2019
Mar. 15, 2019
Jan. 17, 2019
Oct. 26, 2018
Sep. 11, 2018
Subsequent Event [Line Items]                      
Dividends declared (in dollars per share)     $ 0.17   $ 0.17   $ 0.17   $ 0.17   $ 0.15
Dividends paid (in dollars per share)   $ 0.17   $ 0.17   $ 0.17   $ 0.17   $ 0.15  
Subsequent Event                      
Subsequent Event [Line Items]                      
Dividends declared (in dollars per share) $ 0.19