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CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (Parentheticals) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Statement of Comprehensive Income [Abstract]      
Foreign currency translation adjustment tax benefit (expense) $ 0 $ 2,806 $ 4,078
Net investment hedge tax (expense) benefit 0 (2,360) (3,393)
Defined postretirement benefit plan tax benefit (expense) (19,056) 14,140 (21,632)
Defined postretirement reclassification adjusment tax expense 2,043 2,545 1,444
Gain (loss) of other employment-related benefit plans tax benefit $ 0 440 $ 313
Other employment-related reclassification adjustment tax benefit   $ (2,324)