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Income Taxes 7 (Details) (USD $) | Dec. 31, 2010 | Dec. 31, 2009 | Dec. 31, 2008 | Dec. 31, 2007
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Income Taxes [Abstract] |  |  |  |
Unrecognized tax benefit | $ 32,547,000 | $ 34,442,000 | $ 27,786,000 | $ 33,890,000
Effect of unrecognized tax benefit on income tax expense | $ 21,100,000 | $ 18,900,000 |  |

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- Definition The gross amount of unrecognized tax benefits (tax reductions recognized in financial reports but excluded from tax returns) pertaining to uncertain tax positions taken in tax returns as of the beginning balance sheet date, excluding amounts pertaining to examined tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a + Details
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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph b + Details
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