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Income Taxes Deferred Income Taxes, Net, Reconciliation of Gross Deferred Tax Assets and Liabilities (Details) (USD $) | Dec. 31, 2012 | Dec. 31, 2011
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Securities with Other Than Temporary Impairment Losses Recognized Held and Not Deemed Worthless Resulting in a Deferred Tax Asset | $ 23,400,000 | $ 26,000,000
Components of Deferred Tax Assets [Abstract] |  |
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Policyholder Liabilities | 1,698,831,000 | 1,472,653,000
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Impairment Losses | 8,177,000 | 9,072,000
Deferred Tax Assets, Derivative Instruments | 0 | 21,429,000
Deferred Tax Assets, Amounts Due on Reinsurance | 0 | 0
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Reserves | 10,860,000 | 9,946,000
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Legal Settlements | 7,351,000 | 0
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost | 14,659,000 | 15,576,000
Deferred Tax Assets, Operating Loss Carryforwards | 16,783,000 | 14,818,000
Deferred Tax Assets, Other | 7,192,000 | 6,351,000
Deferred Tax Assets, Gross | 1,763,853,000 | 1,549,845,000
Components of Deferred Tax Liabilities [Abstract] |  |
Deferred Tax Liabilities, Deferred Policy Acquisition Costs and Deferred Sales Inducements | (1,425,266,000) | (1,266,042,000)
Deferred Tax Liabilities, Unrealized Gain on Available-for-Sale Securities, Gross | (357,686,000) | (234,066,000)
Deferred Tax Liabilities, Deferred Expense, Deferred Financing Costs | (6,665,000) | (10,917,000)
Deferred Tax Liabilities, Derivatives | (18,280,000) | 0
Deferred Tax Liabilities, Tax Deferred Income | (2,588,000) | (4,315,000)
Deferred Tax Liabilities, Other | (2,671,000) | (12,524,000)
Deferred Tax Liabilities | (1,813,156,000) | (1,527,864,000)
Deferred Tax Assets (Liabilities), Net [Abstract] |  |
Deferred Tax Assets, Net | $ (49,303,000) | $ 21,981,000

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- Definition The amount as of the balance sheet date of the estimated future tax effects attributable to differences between the methods used to account for reinsurance arrangements for tax purposes and under generally accepted accounting principles which will decrease future taxable income when such differences reverse. + References No definition available. + Details
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- Definition Item represents securities with other than temporary impairment losses recognized that have not been sold and are not deemed to be worthless. These securities result in a tax effect as of the balance sheet date of an amount of the estimated future tax deductions arising from estimated impairment losses, which can only be deducted for tax purposes when impaired assets are sold or otherwise disposed of, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken. + References No definition available. + Details
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- Definition The tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from estimated policyholder reserves, which will be deductible from future taxable income when actual costs are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the tax deduction to be taken. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph b -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 2: 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 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 17 -Subparagraph c, d -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 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 6: 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 Amount of deferred tax liability attributable to taxable temporary differences from tax deferred revenue or other income not separately disclosed. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -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. 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 Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6969291&loc=d3e28680-109314 Reference 5: 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. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
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