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Income Taxes (Schedule Of Deferred Tax Assets And Deferred Tax Liabilities) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Deferred tax assets:    
Postretirement and other employee benefits $ 41,604 $ 51,646
Foreign tax credit and other carryforwards 46,283 54,102
Capitalized research and experimental costs 20,243 999
Environmental reserves 3,503 4,057
Inventory adjustments 16,255 13,365
Capital loss 2,697 3,222
Other 5,889 9,052
Total gross deferred tax assets 153,884 136,443
Less: valuation allowance (20,411) (26,312)
Total deferred tax assets 133,473 110,131
Deferred tax liabilities:    
Fixed assets 109,824 102,568
Debt discount amortization 6,620 9,720
Inventory 9,212 9,531
Goodwill and acquired intangibles 10,813 11,299
Other 2,204 2,420
Total deferred tax liabilities 138,673 135,538
Net deferred tax liability $ 5,200 $ 25,407