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Consolidated Statements Of Comprehensive Income (Loss) (Parenthetical) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Statement of Comprehensive Income [Abstract]        
Foreign currency translation adjustment, (benefit) tax $ (2,560) $ 608 $ (2,310) $ 16
Derivative financial instruments adjustment, tax (benefit) (31) 140 136 (174)
Amortization of prior service costs and net gains or losses, tax $ 842 $ 1,410 $ 2,836 $ 4,083