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Income Taxes, Components of Deferred Income Tax (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2011 | Dec. 31, 2010
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Components Of Deferred Tax Assets And Liabilities Abstract |  |
Net current deferred income tax asset | $ 31,905 | $ 26,757
Noncurrent deferred income tax assets |  |
Net operating loss ("NOL") carryforwards | 48,565 | 33,724
Stock-based compensation | 19,079 | 17,204
Other | 36,195 | 38,998
Gross noncurrent deferred income tax assets | 103,839 | 89,926
Less valuation allowance | (29,262) | (28,252)
Total noncurrent deferred income tax assets | 74,577 | 61,674
Noncurrent deferred income tax liabilities |  |
Licenses/intangibles | 267,344 | 246,599
Property, plant and equipment | 482,433 | 323,334
Partnership investments | 120,941 | 71,566
Other | 3,049 | 3,619
Total noncurrent deferred income tax liabilities | 873,767 | 645,118
Net noncurrent deferred income tax liability | $ 799,190 | $ 583,444

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- Definition The noncurrent portion of the aggregate tax effects as of the balance sheet date of all future tax deductions arising from temporary differences between tax basis and generally accepted accounting principles basis recognition of assets, liabilities, revenues and expenses, which can only be deducted for tax purposes when permitted under enacted tax laws, before the valuation allowance, if any, to reduce such amount to net realizable value. In a classified statement of financial position, an enterprise separates deferred tax liabilities and assets into a current amount and a noncurrent amount. Deferred tax liabilities and assets are classified as current or noncurrent based on the classification of the related asset or liability for financial reporting. A deferred tax liability or asset that is not related to an asset or liability for financial reporting, including deferred tax assets related to carryforwards, is classified according to the expected reversal date of the temporary difference. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Deferred Tax Asset -URI http://asc.fasb.org/extlink&oid=6510090 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 41, 42, 43, 289 -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 Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6907571&loc=d3e31917-109318 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907571&loc=d3e31931-109318 + Details
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