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Income Taxes (Details 7) (USD $) | 12 Months Ended |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Oct. 31, 2012 | Sep. 30, 2011 | Dec. 31, 2012 U.S. federal | Dec. 31, 2011 Foreign | Dec. 31, 2012 Foreign
Operating loss carryforwards |  |  |  |  |  |  |  |
Net operating loss carryforward |  |  |  |  |  | $ 335,300,000 |  | $ 309,600,000
Net operating loss carryforwards, not subject to expiration |  |  |  |  |  |  |  | 173,600,000
Net operating loss carryforwards, subject to expiration |  |  |  |  |  |  |  | 51,500,000
Foreign tax credit carryforwards available to offset future payments | 110,191,000 | 100,266,000 |  |  |  |  |  | 110,200,000
Alternative minimum tax credit carryforwards available to offset future payments | 5,920,000 | 13,020,000 |  |  |  |  |  | 5,900,000
Valuation allowance recorded against deferred tax asset for Brazil |  |  |  |  |  |  | 48,600,000 |
Minimum taxable income in Brazil for Realization of deferred tax asset |  |  |  |  |  |  |  | 400,000,000
Change in ownership percentage, minimum | 50.00% |  |  |  |  |  |  |
Period of ownership percentage change | 3 years |  |  |  |  |  |  |
Valuation allowance |  |  |  |  | 1,300,000 |  |  |
Foreign tax credit realization period, maximum | 10 years |  |  |  |  |  |  |
Cumulative earnings generated by non-U.S. subsidiaries | 396,100,000 |  |  |  |  |  |  |
Unrecognized tax benefits , which if recognized would affect the effective tax rate | 9,600,000 | 14,700,000 | 15,600,000 |  |  |  |  |
Potential interest expense and penalties related to unrecognized tax benefits | 2,400,000 | 11,900,000 | 10,600,000 |  |  |  |  |
Aggregate over assessment on income tax examination |  |  |  | 800,000 |  |  |  |
Amount of disallowance of telephone excise tax refund claims for which protests were filed with the Appeals Division of the IRS |  |  |  | 500,000 |  |  |  |
State income tax returns, period subject to examination, low end of range | 3 years |  |  |  |  |  |  |
State income tax returns, period subject to examination, high end of range | 5 years |  |  |  |  |  |  |
State income tax examination period after formal notification, maximum | 1 year |  |  |  |  |  |  |
Maximum reasonably possible decrease in unrecognized tax benefits | $ 2,000,000 |  |  |  |  |  |  |

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- Definition Represents the low end of the range period for which state income tax returns are subject to examination after filing. + References No definition available. + Details
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- Definition Represents minimum taxable income required to be generated in Brazil for fully realization of deferred tax asset. + References No definition available. + Details
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- Definition Represents minimum percentage of change in ownership for annual limitation on utilization of loss carryforwards and credit carryforwards over a period. + References No definition available. + Details
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- Definition The amount the liability recorded for the income tax examination increased or decreased in the current year/accounting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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- Definition The sum of domestic, foreign and state and local operating loss carryforwards, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 48 -Subparagraph a -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. + Details
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- Definition The estimated upper bound of the reasonably possible change in the total amount of the unrecognized tax benefit (that will significantly increase or decrease within twelve months of the balance sheet date) for a tax position taken. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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- Definition Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the United States that are not subject to U.S. federal income taxes. + References No definition available. + Details
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- Definition This element represents the total of interest expense recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity and the amount of statutory penalties in the period in which the entity claims or expects to claim a tax position, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph c -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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 15, 16 -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. + Details
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