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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)

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- Definition The cumulative amount of the estimated future tax effects attributable to the difference between the tax basis of goodwill and intangible assets and the basis of goodwill and intangible assets computed in accordance with generally accepted accounting principles. The difference in basis, whether due to amortization or other reasons, will increase future taxable income when such difference reverses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6969291&loc=d3e28680-109314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 + Details
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