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Fair Value of Financial Instruments (Details 2) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2012 | Dec. 31, 2011
--- | --- | ---
Investments |  |
Investments | $ 5,949,617 | $ 5,677,508
Financial Liabilities |  |
Fixed annuity contract liabilities | 3,073,991 | 2,945,107
Fixed annuity contract liabilities, Fair value | 2,817,564 | 2,699,295
Policyholder account balances on interest-sensitive life contracts | 78,988 | 79,305
Policyholder account balances on interest-sensitive life contracts, Fair value | 76,065 | 76,370
Other policyholder funds | 93,903 | 99,747
Other policyholder funds, Fair Value | 93,903 | 99,747
Short-term debt | 38,000 | 38,000
Short-term Debt, Fair Value | 38,000 | 38,000
Long-term debt | 199,777 | 199,744
Long-term Debt, Fair Value | 216,083 | 214,218
Other investments (1) [Member] |  |
Investments |  |
Investments | 131,095 | 128,460
Investments, Fair Value | 135,185 | 132,522
Level 1 [Member] |  |
Financial Liabilities |  |
Fixed annuity contract liabilities, Fair value |  |
Policyholder account balances on interest-sensitive life contracts, Fair value |  |
Other policyholder funds, Fair Value |  |
Short-term Debt, Fair Value |  |
Long-term Debt, Fair Value | 216,083 | 214,218
Level 1 [Member] | Other investments (1) [Member] |  |
Investments |  |
Investments, Fair Value |  |
Level 2 [Member] |  |
Financial Liabilities |  |
Fixed annuity contract liabilities, Fair value |  |
Policyholder account balances on interest-sensitive life contracts, Fair value |  |
Other policyholder funds, Fair Value |  |
Short-term Debt, Fair Value | 38,000 | 38,000
Long-term Debt, Fair Value |  |
Level 2 [Member] | Other investments (1) [Member] |  |
Investments |  |
Investments, Fair Value |  |
Level 3 [Member] |  |
Financial Liabilities |  |
Fixed annuity contract liabilities, Fair value | 2,817,564 | 2,699,295
Policyholder account balances on interest-sensitive life contracts, Fair value | 76,065 | 76,370
Other policyholder funds, Fair Value | 93,903 | 99,747
Short-term Debt, Fair Value |  |
Long-term Debt, Fair Value |  |
Level 3 [Member] | Other investments (1) [Member] |  |
Investments |  |
Investments, Fair Value | $ 135,185 | $ 132,522

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- Definition The accrued obligation to policyholders that relates to individual and group annuities and supplementary contracts insured events, and can be viewed as either (a) the present value of future benefits to be paid to or on behalf of policyholders and expenses less the present value of future net premiums payable under the insurance contracts or (b) the accumulated amount of net premiums already collected less the accumulated amount of benefits and expenses already paid to or on behalf of policyholders. + References Reference 1: 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 60 -Paragraph 21-26 -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 Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 25 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6482067&loc=d3e13145-158430 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13 -Subparagraph a -Article 7 + Details
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