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Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Statement of Stockholders' Equity      
Dividends declared (in dollars per share) $ 1.50 $ 1.44 $ 1.37
Share retired, shares 54,285 181,417 14,428
Common stock grants awarded, net of unearned compensation (in shares) 9,192 8,506 3,854
Unearned income $ 182 $ 520 $ 147