CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 282,807	$ 279,386	$ 255,215
Other comprehensive income (loss)
Reclassification adjustments for derivatives, net of tax	4,531	4,510	4,738
Pension and other postretirement adjustments, net of tax	9,415	(16,459)	21,788
Cumulative translation adjustment	(63,441)	(77,024)	13,572
Reclassification of foreign currency translation to earnings upon sale of business	(4,725)	0	0
Other comprehensive income (loss)	(54,220)	(88,973)	40,098
Comprehensive income	$ 228,587	$ 190,413	$ 295,313