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Income Taxes (Details 3) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Deferred Tax Assets Net [Abstract]    
Net operating loss carryforwards $ 246,163 $ 323,354
Inventory 4,942 3,950
Alternative minimum tax credit carryforwards 13,020 8,269
Accrued liabilities 14,627 11,217
Foreign tax credit carryforwards 100,266 88,835
Other 39,874 52,407
Subtotal 418,892 488,032
Valuation allowances (76,066) (18,140)
Total deferred tax assets 342,826 469,892
Deferred tax liabilities:    
Property, plant and equipment (336,104) (377,049)
Basis difference in the Partnership (69,922) (81,013)
Goodwill and intangibles 0 (17,987)
Other 0 (28,830)
Total deferred tax liabilities (406,026) (504,879)
Net deferred tax liabilities $ (63,200) $ (34,987)