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Unaudited Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Statement of Stockholders' Equity [Abstract]        
Dividends declared per share (in dollars per share) $ 0.09 $ 0.09 $ 0.27 $ 0.27