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Consolidated Statements Of Comprehensive Income (Loss) (Parenthetical) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Statement of Comprehensive Income [Abstract]        
Foreign currency translation adjustment, (benefit) tax $ 125 $ 42 $ 250 $ (592)
Derivative financial instruments adjustment, tax (benefit) 50 (15) 167 (314)
Amortization of prior service costs and net gains or losses, tax $ 997 $ 1,337 $ 1,994 $ 2,673