Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) (unaudited) - $ / 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 dividend declared per share	$ 0.24	$ 0.24	$ 0.72	$ 0.72