CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 271,109	$ 282,807	$ 279,386
Other comprehensive income (loss)
Reclassification adjustments for derivatives, net of tax	4,361	4,531	4,510
Pension and other postretirement adjustments, net of tax	3,049	9,415	(16,459)
Cumulative translation adjustment	(76,822)	(63,441)	(77,024)
Reclassification of foreign currency translation to earnings upon sale of businesses	14,257	(4,725)	0
Other comprehensive income (loss)	(55,155)	(54,220)	(88,973)
Comprehensive income	$ 215,954	$ 228,587	$ 190,413