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Consolidated Statements of Income and Comprehensive Income (Parenthetical) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Statement of Comprehensive Income [Abstract]    
Income from discontinued operations, income tax expense $ 0 $ 22,273
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax 501 0
Amortization of pension and postretirement plans, income tax expense $ 931 $ 2,204