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Income Tax (Details 4) (USD $) | Dec. 31, 2012 | Dec. 31, 2011
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Deferred Tax Assets, Net [Abstract] |  |
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals | $ 77,116,000 | $ 51,101,000
Deferred Tax Assets Reinsurance Transactions | 17,054,000 | 17,097,000
Deferred Tax Assets Cash And Invested Assets | 0 | 0
Deferred Tax Assets Investment Income | 109,275,000 | 98,496,000
Deferred Tax Assets Deferred Acquisition Costs Capitalized For Tax | 91,886,000 | 67,006,000
Deferred Tax Assets, Operating Loss Carryforwards | 159,821,000 | 174,503,000
Deferred Tax Assets Capital Loss And Foreign Tax Credit Carryforwards | 621,000 | 0
Deferred Tax Assets Deferred Acquisition Costs Capitalized For Financial Reporting | 23,595,000 | 41,737,000
Deferred Tax Assets, Gross | 479,368,000 | 449,940,000
Deferred Tax Assets, Valuation Allowance | 10,100,000 | 8,630,000
Deferred Tax Assets, Net | 469,268,000 | 441,310,000
Deferred Tax Liabilities [Abstract] |  |
Deferred Tax Liabilities, Deferred Expense, Deferred Policy Acquisition Cost | 1,082,394,000 | 1,047,748,000
Deferred Tax Liabilities Reinsurance Transactions | 637,002,000 | 473,767,000
Deferred Tax Liabilities Cash And Invested Assets | 832,940,000 | 574,738,000
Deferred Tax Liabilities Investment Income | 12,719,000 | 13,499,000
Deferred Tax Liabilities, Unrealized Currency Transaction Gains | 0 | 8,604,000
Deferred Tax Liabilities | 2,565,055,000 | 2,118,356,000
Deferred Tax Assets (Liabilities), Net | (2,095,787,000) | (1,677,046,000)
Balance Sheet Presentation Of Deferred Tax Liabilities [Abstract] |  |
Deferred Tax Assets, Other | 24,714,000 | 2,788,000
Deferred income taxes | $ 2,120,501,000 | $ 1,679,834,000

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- Definition The tax effect as of the balance sheet date of the amount of future tax deductions arising from capital losses in excess of statutory limitations 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 and from unused foreign tax credit carryforwards which will decrease future taxable income if applied in future years; 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 The sum of the tax effects as of the balance sheet date of the amount of excesses of tax deductions over gross income in a year which cannot be used on the tax returns in the current year but can be carried forward to reduce taxable income or income taxes payable in a future year, for which there must be sufficient tax-basis income to utilize a portion or all of the carryforward amount to realize the deferred tax asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6969291&loc=d3e28680-109314 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 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 3: 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 Reference 4: 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 + Details
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