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Consolidated Statements of Equity (Unaudited) (Parenthetical) - $ / shares
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Jun. 30, 2019
Dec. 31, 2018
Jun. 30, 2018
Dec. 31, 2017
Statement of Stockholders' Equity [Abstract]                
Common stock, par value per share $ 0.01 $ 0.01 $ 0.01 $ 0.01 $ 0.01 $ 0.01 $ 0.01 $ 0.01
Dividends declared per common share (in dollars per share) $ 0.36 $ 0.36 $ 1.08 $ 1.08