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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (UNAUDITED) (PARENTHETICALS) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Statement of Comprehensive Income [Abstract]    
Foreign currency translation adjustments, tax benefit $ 0 $ 0
Tax benefit (expense) from defined postretirement benefit plan reclassification adjustment $ 631 $ 509