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Fair Values of Financial Instruments (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2013
Fair Value Disclosures [Abstract] |
Fair Value, by Balance Sheet Grouping [Table Text Block] |
| March 31, 2013 |  | December 31, 2012
| Carrying Amount |  | Fair Value |  | Carrying Amount |  | Fair Value
| (Dollars in thousands)
Assets |  |  |  |  |  |  |
Fixed maturity securities: |  |  |  |  |  |  |
Available for sale | $ | 25,609,218 |  |  | $ | 25,609,218 |  |  | $ | 24,172,136 |  |  | $ | 24,172,136 |
Held for investment | 76,129 |  |  | 62,173 |  |  | 76,088 |  |  | 61,521 |
Equity securities, available for sale | 55,215 |  |  | 55,215 |  |  | 53,422 |  |  | 53,422 |
Mortgage loans on real estate | 2,591,897 |  |  | 2,831,426 |  |  | 2,623,940 |  |  | 2,848,235 |
Derivative instruments | 719,683 |  |  | 719,683 |  |  | 415,258 |  |  | 415,258 |
Other investments | 164,950 |  |  | 164,725 |  |  | 163,193 |  |  | 163,517 |
Cash and cash equivalents | 882,097 |  |  | 882,097 |  |  | 1,268,545 |  |  | 1,268,545 |
Coinsurance deposits | 2,941,816 |  |  | 2,699,973 |  |  | 2,910,701 |  |  | 2,678,232 |
Interest rate caps | 3,724 |  |  | 3,724 |  |  | 3,247 |  |  | 3,247 |
2015 notes hedges | 71,203 |  |  | 71,203 |  |  | 43,105 |  |  | 43,105 |
Liabilities |  |  |  |  |  |  |
Policy benefit reserves | 32,610,449 |  |  | 26,941,764 |  |  | 31,452,496 |  |  | 26,264,831 |
Single premium immediate annuity (SPIA) benefit reserves | 446,967 |  |  | 461,429 |  |  | 455,167 |  |  | 469,768 |
Notes payable | 313,043 |  |  | 476,786 |  |  | 309,869 |  |  | 422,175 |
Subordinated debentures | 245,913 |  |  | 224,659 |  |  | 245,869 |  |  | 218,283 |
2015 notes embedded derivatives | 71,203 |  |  | 71,203 |  |  | 43,105 |  |  | 43,105 |
Interest rate swap | 3,528 |  |  | 3,528 |  |  | 4,261 |  |  | 4,261 |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] |
| Total Fair Value |  | Quoted Prices in Active Markets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3)
| (Dollars in thousands)
March 31, 2013 |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |
Fixed maturity securities: |  |  |  |  |  |  |
Available for sale: |  |  |  |  |  |  |
United States Government full faith and credit | $ | 4,616 |  |  | $ | 4,616 |  |  | $ | — |  |  | $ | — |
United States Government sponsored agencies | 1,857,377 |  |  | — |  |  | 1,857,377 |  |  | — |
United States municipalities, states and territories | 3,657,164 |  |  | — |  |  | 3,657,164 |  |  | — |
Foreign government obligations | 100,460 |  |  | — |  |  | 100,460 |  |  | — |
Corporate securities | 15,550,966 |  |  | 25,814 |  |  | 15,525,152 |  |  | — |
Residential mortgage backed securities | 2,668,454 |  |  | — |  |  | 2,666,730 |  |  | 1,724 |
Commercial mortgage backed securities | 748,601 |  |  | — |  |  | 748,601 |  |  | — |
Other asset backed securities | 1,021,580 |  |  | 380 |  |  | 1,021,200 |  |  | — |
Equity securities, available for sale: finance, insurance and real estate | 55,215 |  |  | 37,744 |  |  | 17,471 |  |  | — |
Derivative instruments | 719,683 |  |  | — |  |  | 719,683 |  |  | — |
Cash and cash equivalents | 882,097 |  |  | 882,097 |  |  | — |  |  | — |
Interest rate caps | 3,724 |  |  | — |  |  | 3,724 |  |  | — |
2015 notes hedges | 71,203 |  |  | — |  |  | 71,203 |  |  | — |
| $ | 27,341,140 |  |  | $ | 950,651 |  |  | $ | 26,388,765 |  |  | $ | 1,724 |
Liabilities |  |  |  |  |  |  |
2015 notes embedded derivatives | $ | 71,203 |  |  | $ | — |  |  | $ | 71,203 |  |  | $ | — |
Interest rate swap | 3,528 |  |  | — |  |  | 3,528 |  |  | — |
Fixed index annuities - embedded derivatives | 3,848,902 |  |  | — |  |  | — |  |  | 3,848,902 |
| $ | 3,923,633 |  |  | $ | — |  |  | $ | 74,731 |  |  | $ | 3,848,902 |
December 31, 2012 |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |
Fixed maturity securities: |  |  |  |  |  |  |
Available for sale: |  |  |  |  |  |  |
United States Government full faith and credit | $ | 5,154 |  |  | $ | 5,154 |  |  | $ | — |  |  | $ | — |
United States Government sponsored agencies | 1,772,025 |  |  | — |  |  | 1,772,025 |  |  | — |
United States municipalities, states and territories | 3,578,323 |  |  | — |  |  | 3,578,323 |  |  | — |
Foreign government obligations | 105,259 |  |  | — |  |  | 105,259 |  |  | — |
Corporate securities | 14,466,772 |  |  | 33,131 |  |  | 14,433,641 |  |  | — |
Residential mortgage backed securities | 2,888,113 |  |  | — |  |  | 2,886,301 |  |  | 1,812 |
Commercial mortgage backed securities | 357,982 |  |  | — |  |  | 357,982 |  |  | — |
Other asset backed securities | 998,508 |  |  | 378 |  |  | 998,130 |  |  | — |
Equity securities, available for sale: finance, insurance and real estate | 53,422 |  |  | 36,928 |  |  | 16,494 |  |  | — |
Derivative instruments | 415,258 |  |  | — |  |  | 415,258 |  |  | — |
Cash and cash equivalents | 1,268,545 |  |  | 1,268,545 |  |  | — |  |  | — |
Interest rate caps | 3,247 |  |  | — |  |  | 3,247 |  |  | — |
2015 notes hedges | 43,105 |  |  | — |  |  | 43,105 |  |  | — |
| $ | 25,955,713 |  |  | $ | 1,344,136 |  |  | $ | 24,609,765 |  |  | $ | 1,812 |
Liabilities |  |  |  |  |  |  |
2015 notes embedded derivatives | $ | 43,105 |  |  | $ | — |  |  | $ | 43,105 |  |  | $ | — |
Interest rate swap | 4,261 |  |  | — |  |  | 4,261 |  |  | — |
Fixed index annuities - embedded derivatives | 3,337,556 |  |  | — |  |  | — |  |  | 3,337,556 |
| $ | 3,384,922 |  |  | $ | — |  |  | $ | 47,366 |  |  | $ | 3,337,556 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] |
| Three Months Ended March 31,
| 2013 |  | 2012
| (Dollars in thousands)
Available for sale securities |  |  |
Beginning balance | $ | 1,812 |  |  | $ | 2,098 |
Principal returned | (368 | ) |  | (41 | )
Accretion of discount | 129 |  |  | 26 |
Total gains (losses) (realized/unrealized): |  |  |
Included in other comprehensive income (loss) | 151 |  |  | 102 |
Included in operations | — |  |  | (158 | )
Ending balance | $ | 1,724 |  |  | $ | 2,027 |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] |
| Three Months Ended March 31,
| 2013 |  | 2012
| (Dollars in thousands)
Fixed index annuities - embedded derivatives |  |  |
Beginning balance | $ | 3,337,556 |  |  | $ | 2,530,496 |
Premiums less benefits | 246,722 |  |  | 84,226 |
Change in unrealized gains, net | 264,624 |  |  | 306,315 |
Ending balance | $ | 3,848,902 |  |  | $ | 2,921,037 |

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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + 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 (c) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19279-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c -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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- Definition Tabular disclosure of the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such certain disclosures about the financial instruments, assets, and liabilities include: (1) the fair value of the required items together with their carrying amounts (as appropriate) and (2) the methodology and assumptions used in developing such estimates of fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 14 -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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 18 -Subparagraph c(2), d, e, f -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 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15 -Subparagraph b-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 Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13467-108611 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 19 -Subparagraph a, b, c(1), d(1) -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 7: 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=7578670&loc=d3e19207-110258 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6447952&loc=d3e13220-108610 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph a, c(1), c(2), c(3), 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 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 10 -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 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13476-108611 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612 + Details
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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + 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 (c) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19279-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c -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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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19190-110258 + Details
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