CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Statement of Stockholders' Equity [Abstract]
Other Comprehensive Income (Loss), Tax	$ (4,131)	$ 2,913
Vesting of restricted stock units and other (in shares)	382,228	260,497
Stock Appreciation Rights exercise (in shares)	27,669	8,965