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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) (Parentheticals) - $ / shares
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Statement of Stockholders' Equity [Abstract]        
Cash dividends per share $ 0.30 $ 0.30 $ 0.60 $ 0.60