CONDENSED CONSOLIDATED STATEMENTSOF STOCKHOLDERS' EQUITY (UNAUDITED) (Parenthetical) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement Of Stockholders Equity [Abstract]
Treasury stock shares (in shares)	0	22,073	808,389	50,151