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Condensed Consolidated Statements of Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Statement of Stockholders' Equity (Parenthetical) [Abstract]        
Dividends declared on common stock $ 0.27 $ 0.25 $ 0.54 $ 0.50