Condensed Consolidated Statements of Shareholder's Equity (Parenthetical) - $ / shares	3 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019
Statement Of Stockholders Equity [Abstract]
Dividends declared per share	$ 0.03	$ 0.025	$ 0.135	$ 0.15	$ 0.175	$ 0.20
Dividends paid per share	$ 0.03	$ 0.025	$ 0.135	$ 0.15	$ 0.175	$ 0.20