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Condensed Consolidated Statements of Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Statement of Stockholders' Equity (Parenthetical) [Abstract]        
Dividends declared on common stock $ 0.28 $ 0.27 $ 0.82 $ 0.77