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Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Quantitative Information for Level 3 Inputs) (Details) (USD $) In Thousands, unless otherwise specified | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2014 | Dec. 31, 2013
Corporate Debt Securities [Member] | Market Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Assets, Fair Value Disclosure | $ (248,352) | $ (312,887)
Corporate Debt Securities [Member] | Weighted Average [Member] | Market Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Fair Value Inputs, Discount for Lack of Marketability | 1.00% | 1.00%
Corporate Debt Securities [Member] | Maximum [Member] | Market Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Fair Value Inputs, Discount for Lack of Marketability | 2.00% | 2.00%
Corporate Debt Securities [Member] | Minimum [Member] | Market Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Fair Value Inputs, Discount for Lack of Marketability | 0.00% | 0.00%
Longevity Swap [Member] | Income Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Assets, Fair Value Disclosure | (4,407) |
Longevity Swap [Member] | Weighted Average [Member] | Income Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, Low End | 2.00% |
Fair Value Inputs Mortality Improvement | 3.00% |
Longevity Swap [Member] | Maximum [Member] | Income Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, High End | 100.00% |
Fair Value Inputs Mortality Improvement | 10.00% |
Longevity Swap [Member] | Minimum [Member] | Income Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, Low End | 0.00% |
Fair Value Inputs Mortality Improvement | (10.00%) |
Funds Withheld At Interest Embedded Derivatives [Member] | Total Return Swap [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Assets, Fair Value Disclosure | 36,617 | (176,270)
Funds Withheld At Interest Embedded Derivatives [Member] | Weighted Average [Member] | Total Return Swap [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate, Low End | 7.00% | 7.00%
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, Low End | 2.00% | 2.00%
Fair Value Inputs Withdrawal | 3.00% |
Fair Value Inputs, Entity Credit Risk | 1.00% | 1.00%
Fair Value Inputs Credit Rate | 3.00% | 3.00%
Funds Withheld At Interest Embedded Derivatives [Member] | Maximum [Member] | Total Return Swap [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate, High End | 35.00% | 35.00%
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, High End | 100.00% | 100.00%
Fair Value Inputs Withdrawal | 5.00% | 5.00%
Fair Value Inputs, Entity Credit Risk | 5.00% | 1.00%
Fair Value Inputs Credit Rate | 4.00% | 4.00%
Funds Withheld At Interest Embedded Derivatives [Member] | Minimum [Member] | Total Return Swap [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate, Low End | 0.00% | 0.00%
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, Low End | 0.00% | 0.00%
Fair Value Inputs Withdrawal | 0.00% | 0.00%
Fair Value Inputs, Entity Credit Risk | 0.00% | 0.00%
Fair Value Inputs Credit Rate | 2.00% | 2.00%
US Government Agencies Debt Securities [Member] | Market Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Assets, Fair Value Disclosure | (30,388) | (37,539)
US Government Agencies Debt Securities [Member] | Weighted Average [Member] | Market Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Fair Value Inputs, Discount for Lack of Marketability | 1.00% | 1.00%
US Government Agencies Debt Securities [Member] | Maximum [Member] | Market Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Fair Value Inputs, Discount for Lack of Marketability | 1.00% | 1.00%
US Government Agencies Debt Securities [Member] | Minimum [Member] | Market Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Fair Value Inputs, Discount for Lack of Marketability | 0.00% | 0.00%
US States and Political Subdivisions Debt Securities [Member] | Market Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Assets, Fair Value Disclosure | (4,948) | (29,024)
US States and Political Subdivisions Debt Securities [Member] | Weighted Average [Member] | Market Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Fair Value Inputs, Discount for Lack of Marketability | 1.00% | 1.00%
US States and Political Subdivisions Debt Securities [Member] | Maximum [Member] | Market Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Fair Value Inputs, Discount for Lack of Marketability | 1.00% | 1.00%
US States and Political Subdivisions Debt Securities [Member] | Minimum [Member] | Market Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Fair Value Inputs, Discount for Lack of Marketability | 1.00% | 1.00%
Embedded Derivatives In Indexed Annuity [Member] | Income Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | 911,549 | 838,670
Embedded Derivatives In Indexed Annuity [Member] | Weighted Average [Member] | Income Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate, Low End | 7.00% | 7.00%
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, Low End | 2.00% | 2.00%
Fair Value Inputs Withdrawal | 3.00% | 3.00%
Fair Value Inputs Option Budget Projection | 3.00% | 3.00%
Embedded Derivatives In Indexed Annuity [Member] | Maximum [Member] | Income Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate, High End | 35.00% | 35.00%
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, High End | 100.00% | 100.00%
Fair Value Inputs Withdrawal | 5.00% | 5.00%
Fair Value Inputs Option Budget Projection | 4.00% | 4.00%
Embedded Derivatives In Indexed Annuity [Member] | Minimum [Member] | Income Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate, Low End | 0.00% | 0.00%
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, Low End | 0.00% | 0.00%
Fair Value Inputs Withdrawal | 0.00% | 0.00%
Fair Value Inputs Option Budget Projection | 2.00% | 2.00%
Embedded Derivatives In Variable Annuity [Member] | Income Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | 106,378 | 30,055
Embedded Derivatives In Variable Annuity [Member] | Weighted Average [Member] | Income Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate, Low End | 8.00% | 6.00%
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, Low End | 2.00% | 2.00%
Fair Value Inputs Withdrawal | 2.00% | 3.00%
Embedded Derivatives In Variable Annuity [Member] | Maximum [Member] | Income Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate, High End | 25.00% | 25.00%
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, High End | 100.00% | 100.00%
Fair Value Inputs Withdrawal | 7.00% | 7.00%
Embedded Derivatives In Variable Annuity [Member] | Minimum [Member] | Income Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate, Low End | 0.00% | 0.00%
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, Low End | 0.00% | 0.00%
Fair Value Inputs Withdrawal | 0.00% | 0.00%
Embedded Derivatives In Variable Annuity Contracts [Member] | Weighted Average [Member] | Income Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Fair Value Inputs, Entity Credit Risk | 1.00% | 1.00%
Fair Value Assumptions, Expected Volatility Rate | 15.00% | 10.00%
Embedded Derivatives In Variable Annuity Contracts [Member] | Maximum [Member] | Income Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Fair Value Inputs, Entity Credit Risk | 5.00% | 1.00%
Fair Value Assumptions, Expected Volatility Rate | 27.00% | 27.00%
Embedded Derivatives In Variable Annuity Contracts [Member] | Minimum [Member] | Income Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Fair Value Inputs, Entity Credit Risk | 0.00% | 0.00%
Fair Value Assumptions, Expected Volatility Rate | 0.00% | 0.00%
Mortality Swap [Member] | Income Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | $ 320 |
Mortality Swap [Member] | Weighted Average [Member] | Income Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, Low End | 1.00% |
Mortality Swap [Member] | Maximum [Member] | Income Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, High End | 100.00% |
Mortality Swap [Member] | Minimum [Member] | Income Approach Valuation Technique [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Long-Duration Contracts, Assumptions by Product and Guarantee, Mortality Rate, Low End | 0.00% |

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Adjustment to the discount rate used to measure fair value for lack of ability to convert business interests into cash quickly. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Risk associated with risk of default, credit spread risk and downgrade risk, expressed as a percentage, used as an input to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Anticipated rate of future terminations of contracts in force as of the balance sheet date at the high end of the range of reasonable estimates, which is included in determining the amount of the specified guaranteed benefit obligation as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6482852&loc=d3e14931-158439 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 80 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6484115&loc=d3e19393-158473 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section 55 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6588021&loc=d3e7104-158389 + Details
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- Definition Actuarially determined death rate of policyholders at the high end of the range of reasonable estimates, which is included in determining the amount of the specified guaranteed benefit obligation as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6482852&loc=d3e14931-158439 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 80 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6484115&loc=d3e19393-158473 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section 55 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6588021&loc=d3e7104-158389 + Details
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