CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019
Statement of Stockholders' Equity [Abstract]
Total other comprehensive income, deferred income taxes		$ (1,569)	$ 1,729	$ (689)	$ (3,909)	$ 467	$ (2,118)
Vesting of restricted stock units and other stock grants (in shares)		99,134	94,229	12,730	266,803	102,695	984
Stock appreciation rights exercised (in shares)		10,216	927	5,085	20,024	2,560	103
Vesting of performance share units (in shares)		0	529,213	0	0	0	0
Treasury Stock, Shares, Acquired	1,417,556