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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Increase (Decrease) in Shareholders' Equity [Roll Forward]    
Distribution of shares of treasury stock for directors' deferred compensation (in shares) 2,707 6,426
Distribution of shares of treasury stock granted for employee restricted stock awards (in shares) 20,763 14,805
Cash dividends declared (in dollars per share) $ 1.19 $ 1.04
Distribution of shares of treasury stock for directors' compensation (in shares) 9,291 7,923
Distribution of shares of treasury stock for employee compensation (in shares) 3,860 2,274
Sale of shares of treasury stock (in shares) 10,322 36,104
Purchase of shares of treasury stock (in shares) 41,424 257,018
Restricted stock awards, forfeited (in shares)   112