CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 103,848	$ 105,194	$ 276,710	$ 328,671
Other comprehensive income (loss):
Reclassification adjustments for derivatives, net of tax	672	1,210	3,982	3,661
Pension and other postretirement adjustments, net of tax	291	1,663	1,956	4,181
Cumulative translation adjustment	47,343	(37,825)	40,158	(38,478)
Other comprehensive income (loss)	48,306	(34,952)	46,096	(30,636)
Comprehensive income	$ 152,154	$ 70,242	$ 322,806	$ 298,035