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Comprehensive Income (Loss) (Pension and Postretirement Benefits) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]    
Actuarial loss $ (36,928) $ (25,367)
Amortization of actuarial loss 11,808 6,303
Prior service credit 2,672 499
Amortization of prior service cost 3,006 2,757
Amortization of transition obligation 102 124
Currency impact (749) 0
Other (76) 658
Total change $ (20,165) $ (15,026)