CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Stockholders' Equity [Abstract]
Distribution of Shares of Treasury Stock for Employee Restricted Stock Awards (in shares)				439
Distribution of shares of treasury stock grants for employee restricted stock awards (in shares)			255
Cash dividends declared (in dollars per share)	$ 0.26	$ 0.26	$ 0.78	$ 0.78
Distribution of shares of treasury stock for directors' compensation (in shares)			7,923	8,465
Distribution of shares of treasury stock for employee stock compensation (in shares)			2,274	2,373
Distribution of Shares of Treasury Stock for Deferred Directors’ Compensation (in shares)			6,426	2,551
Purchase of shares of treasury stock (in shares)	64,185		186,206	272
Sale of shares of treasury stock (in shares)	18,202	2,485	32,387	10,250
Forfeitures of shares of restricted stock awards (in shares)			112