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Income Taxes (Summary Of Tax Loss And Tax Credit Carryforwards) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Tax Credit Carryforward [Line Items] |  |
Deferred tax asset on tax carryforwards | $ 77,098 | $ 93,337
Valuation Allowance, Amount | (62,064) |
Net deferred tax asset on tax carryforwards | 15,034 |
U.S. Federal Tax Credits [Member] |  |
Tax Credit Carryforward [Line Items] |  |
2012-2016 | 105 |
After 2016 | 14,547 |
Total tax carryforwards | 14,652 |
Deferred tax asset on tax carryforwards | 14,652 |
Valuation Allowance, Amount | (262) |
Net deferred tax asset on tax carryforwards | 14,390 |
U.S Federal Tax Losses [Member] |  |
Tax Credit Carryforward [Line Items] |  |
After 2016 | 1,067 |
Total tax carryforwards | 1,067 |
Deferred tax asset on tax carryforwards | 373 |
Valuation Allowance, Amount | (373) |
Net deferred tax asset on tax carryforwards | 0 |
U.S. State Tax Credits [Member] |  |
Tax Credit Carryforward [Line Items] |  |
2012-2016 | 2,039 |
After 2016 | 4,162 |
Indefinite | 15,959 |
Total tax carryforwards | 22,160 |
Deferred tax asset on tax carryforwards | 14,404 |
Valuation Allowance, Amount | (13,760) |
Net deferred tax asset on tax carryforwards | 644 |
U.S. State Tax Losses [Member] |  |
Tax Credit Carryforward [Line Items] |  |
2012-2016 | 161,854 |
After 2016 | 410,775 |
Total tax carryforwards | 572,629 |
Deferred tax asset on tax carryforwards | 26,297 |
Valuation Allowance, Amount | (26,297) |
Non-U.S. Tax Losses [Member] |  |
Tax Credit Carryforward [Line Items] |  |
2012-2016 | 6,912 |
After 2016 | 30,656 |
Indefinite | 39,088 |
Total tax carryforwards | 76,656 |
Deferred tax asset on tax carryforwards | 21,372 |
Valuation Allowance, Amount | (21,372) |
Net deferred tax asset on tax carryforwards | $ 0 |

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- Definition The tax effect net of valuation allowance on tax carryforwards as of the balance sheet date of the amount of future tax deductions arising from unused tax credit carryforwards of a nature not otherwise listed in the existing taxonomy. A tax credit carryforward is the amount by which tax credits available for utilization exceeded statutory limits on inclusion in historical filings, and which can only be utilized if sufficient tax-basis income is generated in future periods and providing tax laws continue to allow such utilization. + References No definition available. + Details
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- Definition Tax loss and carryforwards, expiry amount, after five years. + References No definition available. + Details
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- Definition The tax effect as of the balance sheet date of the amount of future tax deductions arising from all unused tax credit carryforwards which have been reduced by a valuation allowance. + 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 Accounting Standards Codification -Glossary Carryforwards -URI http://asc.fasb.org/extlink&oid=6506874 Reference 3: 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 4: 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 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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- Definition The amount of the valuation allowance recorded as of the balance sheet date pertaining to the specified deferred tax asset for which an assessment was made that it is more likely than not that all or a portion of such deferred tax asset will not be realized through related deductions on future tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 -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 Accounting Standards Codification -Glossary Valuation Allowance -URI http://asc.fasb.org/extlink&oid=6528051 + Details
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