CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Treasury Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury shares purchased (in shares)	0	26,210
Restricted shares issued (in shares)	20,000	355,000
Shares issued under stock plans (in shares)	4,701	10,862