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Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) - $ / shares
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Statement of Stockholders' Equity [Abstract]    
Accounting Standards Update [Extensible List] Accounting Standards Update 2016-13 [Member] Accounting Standards Update 2016-02 [Member]
Cash dividends declared, per share (in dollars per share) $ 1.32 $ 1.23