CONDENSED CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018
Statement Of Stockholders Equity [Abstract]
Cash dividend payments, per share	$ 0.08	$ 0.07	$ 0.07	$ 0.07	$ 0.06	$ 0.06