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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Statement of Comprehensive Income [Abstract]    
Net income $ 75,899 $ 68,130
Other comprehensive income (loss)    
Reclassification adjustments for derivatives, net of tax 1,042 1,097
Pension and other postretirement adjustments, net of tax 1,124 671
Cumulative translation adjustment 21,050 16,217
Other comprehensive income (loss) 23,216 17,985
Comprehensive income $ 99,115 $ 86,115