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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME        
Net actuarial gain (loss), tax $ 1,515 $ (116) $ 349 $ (3,488)
Pension settlement expense, tax 233 353 668 1,789
Amortization of unrecognized net periodic benefit costs, tax 396 261 796 467
Change in unrealized income (loss) on interest rate swap, tax 158   (77)  
Change in foreign currency translation, tax $ 61 $ 65 $ (126) $ 41