CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net income	$ 63,799	$ 50,127	$ 187,660	$ 156,649
Other comprehensive income
Reclassification adjustments for derivatives, net of tax	1,174	1,204	3,551	3,644
Pension and other postretirement adjustments, net of tax	696	1,428	2,907	4,516
Cumulative translation adjustment	28,835	23,335	5,726	11,635
Other comprehensive income	30,705	25,967	12,184	19,795
Comprehensive income	$ 94,504	$ 76,094	$ 199,844	$ 176,444