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Summary of Significant Accounting Policies (Narrative Details) (USD $) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Accounting Policies [Abstract] |  |  |
Goodwill | $ 7,000,000 | $ 7,000,000 |
Value of Business Acquired (VOBA) | 600,000 | 800,000 |
Accumulated Amortization Of Value Of Business Acquired VOBA | 24,800,000 | 24,600,000 |
Amortization of Value of Business Acquired (VOBA) | 200,000 | 200,000 | 12,300,000
Values Of Business Acquired Distribution Agreements And Customer Relationships | 95,900,000 | 106,300,000 |
Accumulated Amortization Of Values Of Business Acquired Distribution Agreements And Customer Relationships | 24,800,000 | 14,300,000 |
Amortization Of Values Of Business Acquired Distribution Agreements And Customer Relationships | 10,500,000 | 10,900,000 |
Future Amortization Expense, Year One | 10,100,000 |  |
Future Amortization Expense, Year Two | 9,500,000 |  |
Future Amortization Expense, Year Three | 9,400,000 |  |
Future Amortization Expense, Year Four | 9,000,000 |  |
Future Amortization Expense, Year Five | 8,700,000 |  |
Capitalized Computer Software, Net | 43,200,000 | 33,000,000 |
Capitalized Computer Software, Amortization | 6,500,000 | 4,300,000 | 4,000,000
Traditional Life, Interest Rate, Low End | 3.00% |  |
Traditional Life, Interest Rate, High End | 6.00% |  |
Maximum Life Insurance Retention Per Individual Life | 8,000,000 |  |
Retrocession Pool Participants Minimum AM Best Rating | "A-(excellent)" | "A-(excellent)" |
Claims Recoverable From Retrocessionaires Past Due | 10,400,000 | 11,400,000 |
New Accounting Pronouncement Or Change In Accounting Principle Cumulative Effect Of Change On Deferred Aquisition Costs |  | 470,100,000 |
Reinsurance Claims Recoverables | 156,000,000 | 151,900,000 |
New Accounting Pronouncement Or Change In Accounting Principle Cumulative Effect Of Change On Equity |  | $ 318,400,000 |

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- Definition The adjustment that represents the periodic charge against earnings to reduce the business acquired distribution agreements and customer relationships (VODA and VOCRA) over the expected life of the underlying insurance contracts. + References No definition available. + Details
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- Definition The known and estimated amount recoverable as of the balance sheet date from reinsurers for claims paid or incurred by the ceding insurer and associated claims settlement expenses, including estimated amounts for claims incurred but not reported, and policy benefits, net of any related valuation allowance. Claims recoverable due from retrocessionaires. + References No definition available. + Details
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- Definition The adjustment that represents the periodic charge against earnings to reduce the value of business acquired (VOBA) over the expected life of the underlying insurance contracts. VOBA reflects the estimated fair value of a life insurance business in force and represents the portion of the cost to acquire the business that is allocated to the value of the right to receive future cash flows from insurance contracts existing at the date of acquisition. Such value is the present value of the actuarially determined projected cash flows for the acquired policies. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 92-9 -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 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section S99 -Paragraph 2 -Subparagraph (2) -URI http://asc.fasb.org/extlink&oid=6784649&loc=d3e569990-122904 + Details
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- Definition Maximum interest rate for traditional life contracts in the range of interest rates used to calculate future benefits to be paid to or on behalf of policyholders and related expenses less the present value of future net premiums using assumptions such as estimates of expected investment yields, mortality, morbidity, terminations and expenses, applicable at the time the insurance contracts are made and costs of settling insured claims and costs incurred in the claims settlement process of traditional life. + 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 SEC -Name Regulation S-X (SX) -Number 210 -Article 7 -Section 03 -Paragraph 13 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 60 -Paragraph 60 -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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.13(b)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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