CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 68,130	$ 65,954
Other comprehensive income (loss)
Reclassification adjustments for derivatives, net of tax	1,097	1,130
Pension and other postretirement adjustments, net of tax	671	780
Cumulative translation adjustment	16,217	(56,637)
Other comprehensive income (loss)	17,985	(54,727)
Comprehensive income	$ 86,115	$ 11,227