CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Jun. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Stockholders' Equity [Abstract]
Distribution of shares of treasury stock for employee restricted stock awards (in shares)				255
Cash dividends declared (in dollars per share)	$ 0.31	$ 0.26	$ 0.88	$ 0.78
Distribution of shares of treasury stock for directors' compensation (in shares)			9,291	7,923
Distribution of shares of treasury stock for employee stock compensation (in shares)			3,860	2,274
Distribution of shares of treasury stock for deferred directors’ compensation (in shares)			2,707	6,426
Purchase of shares of treasury stock (in shares)	97	64,185	28,803	186,206
Sale of shares of treasury stock (in shares)	1,887	18,202	7,911	32,387
Forfeitures of shares of restricted stock awards (in shares)				112