Consolidated Statements of Stockholders' Equity (Unaudited) (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]
Treasury shares withheld for payment of taxes, weighted average price per share (USD per share)	[1]	$ 28.29	$ 25.56	$ 56.48	$ 58.68	$ 55.06	$ 49.75

[1] Weighted average price per share.