CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Stockholders' Equity [Abstract]
Cash dividends (in dollars per share)	$ 0.27	$ 0.27	$ 0.81	$ 0.81
Issuance of common shares pursuant to stock-based compensation plan, net (in shares)	4,412	1,165	83,506	67,790
Purchase of common shares (in shares)	314,672		434,938	128,779