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Fair Value Disclosures (Tables) | 12 Months Ended
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Dec. 31, 2012
Fair Value Of Financial Instruments [Abstract] |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] |
December 31, 2012: |  |  |  |  | Fair Value Measurements Using:
|  | Total |  |  | Level 1 |  |  | Level 2 |  |  | Level 3
Assets: |  |  |  |  |  |  |  |  |  |  |
| Fixed maturity securities – available-for-sale: |  |  |  |  |  |  |  |  |  |  |
|  | Corporate securities | $ | 12,380,071 |  | $ | 43,544 |  | $ | 10,667,964 |  | $ | 1,668,563
|  | Canadian and Canadian provincial governments |  | 4,049,334 |  |  | -- |  |  | 4,049,334 |  |  | --
|  | Residential mortgage-backed securities |  | 1,042,064 |  |  | -- |  |  | 948,133 |  |  | 93,931
|  | Asset-backed securities |  | 691,555 |  |  | -- |  |  | 459,164 |  |  | 232,391
|  | Commercial mortgage-backed securities |  | 1,698,903 |  |  | -- |  |  | 1,531,897 |  |  | 167,006
|  | U.S. government and agencies securities |  | 265,190 |  |  | 192,780 |  |  | 67,872 |  |  | 4,538
|  | State and political subdivision securities |  | 302,498 |  |  | -- |  |  | 259,286 |  |  | 43,212
|  | Other foreign government, supranational and foreign |  |  |  |  |  |  |  |  |  |  |
|  |  | government-sponsored enterprises |  | 1,861,999 |  |  | 297,025 |  |  | 1,536,694 |  |  | 28,280
|  |  |  | Total fixed maturity securities – available-for-sale |  | 22,291,614 |  |  | 533,349 |  |  | 19,520,344 |  |  | 2,237,921
| Funds withheld at interest – embedded derivatives |  | (243,177) |  |  | -- |  |  | -- |  |  | (243,177)
| Cash equivalents |  | 575,864 |  |  | 575,864 |  |  | -- |  |  | --
| Short-term investments |  | 239,131 |  |  | 178,923 |  |  | 38,177 |  |  | 22,031
| Other invested assets: |  |  |  |  |  |  |  |  |  |  |
|  | Non-redeemable preferred stock |  | 74,841 |  |  | 64,268 |  |  | 10,573 |  |  | --
|  | Other equity securities |  | 147,859 |  |  | 147,859 |  |  | -- |  |  | --
|  | Derivatives: |  |  |  |  |  |  |  |  |  |  |
|  |  | Interest rate swaps |  | 104,972 |  |  | -- |  |  | 104,972 |  |  | --
|  |  | Foreign currency forwards |  | 1,017 |  |  | -- |  |  | 1,017 |  |  | --
|  |  | CPI swaps |  | 1,446 |  |  | -- |  |  | 1,446 |  |  | --
|  |  | Credit default swaps |  | (1,741) |  |  | -- |  |  | (1,741) |  |  | --
|  |  | Equity options |  | 62,514 |  |  | -- |  |  | 62,514 |  |  | --
|  | Collateral |  | 17,002 |  |  | 1,323 |  |  | 15,679 |  |  | --
|  | Other |  | 11,951 |  |  | 11,951 |  |  | -- |  |  | --
|  |  |  | Total other invested assets |  | 419,861 |  |  | 225,401 |  |  | 194,460 |  |  | --
|  | Total | $ | 23,283,293 |  | $ | 1,513,537 |  | $ | 19,752,981 |  | $ | 2,016,775
Liabilities: |  |  |  |  |  |  |  |  |  |  |
| Interest sensitive contract liabilities – embedded derivatives | $ | 912,361 |  | $ | -- |  | $ | -- |  | $ | 912,361
| Other liabilities: |  |  |  |  |  |  |  |  |  |  |
|  | Derivatives: |  |  |  |  |  |  |  |  |  |  |
|  |  | Interest rate swaps |  | 196 |  |  | -- |  |  | 196 |  |  | --
|  |  | Foreign currency forwards |  | 2,105 |  |  | -- |  |  | 2,105 |  |  | --
|  |  | Credit default swaps |  | 1,953 |  |  | -- |  |  | 1,953 |  |  | --
|  |  | Foreign currency swaps |  | 27,398 |  |  | -- |  |  | 27,398 |  |  | --
|  | Total | $ | 944,013 |  | $ | -- |  | $ | 31,652 |  | $ | 912,361
December 31, 2011: |  |  |  |  | Fair Value Measurements Using:
|  | Total |  |  | Level 1 |  |  | Level 2 |  |  | Level 3
Assets: |  |  |  |  |  |  |  |  |  |  |
| Fixed maturity securities – available-for-sale: |  |  |  |  |  |  |  |  |  |  |
|  | Corporate securities | $ | 7,461,106 |  | $ | 76,097 |  | $ | 6,410,840 |  | $ | 974,169
|  | Canadian and Canadian provincial governments |  | 3,869,933 |  |  | -- |  |  | 3,869,933 |  |  | --
|  | Residential mortgage-backed securities |  | 1,227,234 |  |  | -- |  |  | 1,145,579 |  |  | 81,655
|  | Asset-backed securities |  | 401,991 |  |  | -- |  |  | 208,499 |  |  | 193,492
|  | Commercial mortgage-backed securities |  | 1,242,219 |  |  | -- |  |  | 1,126,243 |  |  | 115,976
|  | U.S. government and agencies securities |  | 374,002 |  |  | 300,514 |  |  | 73,488 |  |  | --
|  | State and political subdivision securities |  | 205,386 |  |  | 12,894 |  |  | 182,119 |  |  | 10,373
|  | Other foreign government, supranational and foreign |  |  |  |  |  |  |  |  |  |  |
|  |  | government-sponsored enterprises |  | 1,419,079 |  |  | 223,440 |  |  | 1,195,639 |  |  | --
|  |  |  | Total fixed maturity securities – available-for-sale |  | 16,200,950 |  |  | 612,945 |  |  | 14,212,340 |  |  | 1,375,665
| Funds withheld at interest – embedded derivatives |  | (361,456) |  |  | -- |  |  | -- |  |  | (361,456)
| Cash equivalents |  | 504,522 |  |  | 504,522 |  |  | -- |  |  | --
| Short-term investments |  | 46,671 |  |  | 37,155 |  |  | 9,516 |  |  | --
| Other invested assets: |  |  |  |  |  |  |  |  |  |  |
|  | Non-redeemable preferred stock |  | 78,183 |  |  | 58,906 |  |  | 19,277 |  |  | --
|  | Other equity securities |  | 35,717 |  |  | 5,308 |  |  | 18,920 |  |  | 11,489
|  | Derivatives: |  |  |  |  |  |  |  |  |  |  |
|  |  | Interest rate swaps |  | 168,484 |  |  | -- |  |  | 168,484 |  |  | --
|  |  | Foreign currency forwards |  | 4,560 |  |  | -- |  |  | 4,560 |  |  | --
|  |  | CPI swaps |  | 766 |  |  | -- |  |  | 766 |  |  | --
|  |  | Credit default swaps |  | (4,003) |  |  | -- |  |  | (4,003) |  |  | --
|  |  | Equity options |  | 87,243 |  |  | -- |  |  | 87,243 |  |  | --
|  | Collateral |  | 32,622 |  |  | 27,052 |  |  | 5,570 |  |  | --
|  | Other |  | 59,373 |  |  | 59,373 |  |  | -- |  |  | --
|  |  |  | Total other invested assets |  | 462,945 |  |  | 150,639 |  |  | 300,817 |  |  | 11,489
| Reinsurance ceded receivable – embedded derivatives |  | 4,945 |  |  | -- |  |  | -- |  |  | 4,945
|  | Total | $ | 16,858,577 |  | $ | 1,305,261 |  | $ | 14,522,673 |  | $ | 1,030,643
Liabilities: |  |  |  |  |  |  |  |  |  |  |
| Interest sensitive contract liabilities – embedded derivatives | $ | 1,028,241 |  | $ | -- |  | $ | -- |  | $ | 1,028,241
| Other liabilities: |  |  |  |  |  |  |  |  |  |  |
|  | Derivatives: |  |  |  |  |  |  |  |  |  |  |
|  |  | Interest rate swaps |  | 3,171 |  |  | -- |  |  | 3,171 |  |  | --
|  |  | Credit default swaps |  | 5,633 |  |  | -- |  |  | 5,633 |  |  | --
|  |  | Equity options |  | (2,864) |  |  | -- |  |  | (2,864) |  |  | --
|  |  | Foreign currency swaps |  | 23,710 |  |  | -- |  |  | 23,710 |  |  | --
|  | Total | $ | 1,057,891 |  | $ | -- |  | $ | 29,650 |  | $ | 1,028,241
Fair Value Unobservable Input Measurements [Table Text Block] |
December 31, 2012: |  |  |  | Valuation |  | Unobservable |  | Range
|  |  |  | Fair Value |  | Technique(s) |  | Input |  | (Weighted Average)
Assets: |  |  |  |  |  |  |  |  |
| State and political subdivision securities |  | $ | 5,451 |  | Market comparable securities |  | Liquidity premium |  | 1%
| Corporate securities |  |  | 450,177 |  | Market comparable securities |  | Liquidity premium |  | 0-2% (1%)
| Short-term investments |  |  | 22,031 |  | Market comparable securities |  | Liquidity premium |  | 1%
| Funds withheld at interest- embedded derivatives |  |  | (243,177) |  | Total return swap |  | Mortality |  | 0-100% (1%)
|  |  |  |  |  |  |  |  | Lapse |  | 0-35% (6%)
|  |  |  |  |  |  |  |  | Withdrawal |  | 0-5% (3%)
|  |  |  |  |  |  |  |  | Own Credit |  | 0-1% (1%)
|  |  |  |  |  |  |  |  | Crediting rate |  | 2-4% (3%)
December 31, 2012 (continued): |  |  |  | Valuation |  | Unobservable |  | Range
|  |  |  | Fair Value |  | Technique(s) |  | Input |  | (Weighted Average)
Liabilities: |  |  |  |  |  |  |  |  |
| Interest sensitive contract liabilities- embedded derivatives- indexed annuities |  |  | 740,256 |  | Discounted cash flow |  | Mortality |  | 0-100% (1%)
|  |  |  |  |  |  |  |  | Lapse |  | 0-35% (6%)
|  |  |  |  |  |  |  |  | Withdrawal |  | 0-5% (3%)
|  |  |  |  |  |  |  |  | Option budget projection |  | 2-4% (3%)
| Interest sensitive contract liabilities- embedded derivatives- variable annuities |  |  | 172,105 |  | Discounted cash flow |  | Mortality |  | 0-100% (2%)
|  |  |  |  |  |  |  |  | Lapse |  | 0-25% (5%)
|  |  |  |  |  |  |  |  | Withdrawal |  | 0-7% (3%)
|  |  |  |  |  |  |  |  | Own Credit |  | 0-1% (1%)
|  |  |  |  |  |  |  |  | Long-term volatility |  | 0-27% (14%)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Level Transfers [Table Text Block] |
|  |  |  |  | Twelve months ended December 31,
|  |  |  |  | 2012 |  | 2011
|  |  |  |  | Transfers from |  | Transfers from |  | Transfers from |  | Transfers from
|  |  |  |  | Level 1 to |  | Level 2 to |  | Level 1 to |  | Level 2 to
|  |  |  |  | Level 2 |  | Level 1 |  | Level 2 |  | Level 1
| Fixed maturity securities - available-for-sale: |  |  |  |  |  |  |  |  |  |  |
|  | Corporate securities | $ | 14,773 |  | $ | 4 |  | $ | -- |  | $ | 50,238
|  | U.S. government and agencies securities |  | -- |  |  | 11,152 |  |  | 75,501 |  |  | --
|  | State and political subdivision securities |  | 12,794 |  |  | -- |  |  | -- |  |  | 5,485
|  | Other foreign government, supranational and foreign |  |  |  |  |  |  |  |  |  |  |
|  |  | government-sponsored enterprises |  | 3,222 |  |  | -- |  |  | 1,845 |  |  | --
| Total fixed maturity securities |  | 30,789 |  |  | 11,156 |  |  | 77,346 |  |  | 55,723
|  | Non-redeemable preferred stock |  | 9,646 |  |  | 11,068 |  |  | 2 |  |  | 3,256
|  | Other equity securities |  | -- |  |  | -- |  |  | 2,290 |  |  | --
| Total | $ | 40,435 |  | $ | 22,224 |  | $ | 79,638 |  | $ | 58,979
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Table Text Block] |
For the year ended December 31, 2012: | Fixed maturity securities - available-for-sale
|  |  |  |  |  |  |  | Residential |  |  |  |  |  | Commercial
|  |  |  | Corporate |  |  | mortgage-backed |  |  | Asset-backed |  |  | mortgage-backed
|  |  |  | securities |  |  | securities |  |  | securities |  |  | securities
Balance January 1, 2012 | $ | 974,169 |  | $ | 81,655 |  | $ | 193,492 |  | $ | 115,976
| Total gains/losses (realized/unrealized) |  |  |  |  |  |  |  |  |  |  |
|  | Included in earnings, net: |  |  |  |  |  |  |  |  |  |  |
|  |  | Investment income, net of related expenses |  | (6,839) |  |  | 431 |  |  | 1,214 |  |  | 2,032
|  |  | Investment related gains (losses), net |  | (2,884) |  |  | (311) |  |  | (516) |  |  | (9,503)
|  |  | Claims & other policy benefits |  | -- |  |  | -- |  |  | -- |  |  | --
|  |  | Interest credited |  | -- |  |  | -- |  |  | -- |  |  | --
|  |  | Policy acquisition costs and other insurance expenses |  | -- |  |  | -- |  |  | -- |  |  | --
|  | Included in other comprehensive income |  | 34,488 |  |  | 2,863 |  |  | 21,463 |  |  | 24,663
| Purchases(1) |  | 853,848 |  |  | 77,781 |  |  | 111,567 |  |  | 31,699
| Sales(1) |  | (60,224) |  |  | (48,828) |  |  | (13,140) |  |  | (14,060)
| Settlements(1) |  | (144,667) |  |  | (8,541) |  |  | (16,235) |  |  | (813)
| Transfers into Level 3 |  | 65,283 |  |  | 19,632 |  |  | 11,832 |  |  | 64,116
| Transfers out of Level 3 |  | (44,611) |  |  | (30,751) |  |  | (77,286) |  |  | (47,104)
Balance December 31, 2012 | $ | 1,668,563 |  | $ | 93,931 |  | $ | 232,391 |  | $ | 167,006
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period |  |  |  |  |  |  |  |  |  |  |
|  | Included in earnings, net: |  |  |  |  |  |  |  |  |  |  |
|  |  | Investment income, net of related expenses | $ | (6,852) |  | $ | 295 |  | $ | 1,156 |  | $ | 2,032
|  |  | Investment related gains (losses), net |  | (1,329) |  |  | (269) |  |  | (849) |  |  | (14,163)
|  |  | Claims & other policy benefits |  | -- |  |  | -- |  |  | -- |  |  | --
|  |  | Interest credited |  | -- |  |  | -- |  |  | -- |  |  | --
|  |  | Policy acquisition costs and other insurance expenses |  | -- |  |  | -- |  |  | -- |  |  | --
For the year ended December 31, 2012 (continued): | Fixed maturity securities - available-for-sale |  |  |
|  |  |  |  |  |  |  |  |  | Other foreign |  |  |
|  |  |  | U.S. |  | State |  | government, |  | Funds withheld
|  |  |  | Government |  | and political |  | supranational and |  | at interest-
|  |  |  | and agencies |  | subdivision |  | foreign government- |  | embedded
|  |  |  | securities |  | securities |  | sponsored enterprises |  | derivative
Balance January 1, 2012 | $ | -- |  | $ | 10,373 |  | $ | -- |  | $ | (361,456)
| Total gains/losses (realized/unrealized) |  |  |  |  |  |  |  |  |  |  |
|  | Included in earnings, net: |  |  |  |  |  |  |  |  |  |  |
|  |  | Investment income, net of related expenses |  | (89) |  |  | 14 |  |  | (44) |  |  | --
|  |  | Investment related gains (losses), net |  | -- |  |  | (16) |  |  | -- |  |  | 118,279
|  |  | Claims & other policy benefits |  | -- |  |  | -- |  |  | -- |  |  | --
|  |  | Interest credited |  | -- |  |  | -- |  |  | -- |  |  | --
|  |  | Policy acquisition costs and other insurance expenses |  | -- |  |  | -- |  |  | -- |  |  | --
|  | Included in other comprehensive income |  | (12) |  |  | 4,491 |  |  | (139) |  |  | --
| Purchases(1) |  | 4,639 |  |  | -- |  |  | 28,463 |  |  | --
| Sales(1) |  | -- |  |  | -- |  |  | -- |  |  | --
| Settlements(1) |  | -- |  |  | (413) |  |  | -- |  |  | --
| Transfers into Level 3 |  | -- |  |  | 37,588 |  |  | -- |  |  | --
| Transfers out of Level 3 |  | -- |  |  | (8,825) |  |  | -- |  |  | --
Balance December 31, 2012 | $ | 4,538 |  | $ | 43,212 |  | $ | 28,280 |  | $ | (243,177)
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period |  |  |  |  |  |  |  |  |  |  |
|  | Included in earnings, net: |  |  |  |  |  |  |  |  |  |  |
|  |  | Investment income, net of related expenses | $ | (89) |  | $ | 14 |  | $ | (44) |  | $ | --
|  |  | Investment related gains (losses), net |  | -- |  |  | -- |  |  | -- |  |  | 118,279
|  |  | Claims & other policy benefits |  | -- |  |  | -- |  |  | -- |  |  | --
|  |  | Interest credited |  | -- |  |  | -- |  |  | -- |  |  | --
|  |  | Policy acquisition costs and other insurance expenses |  | -- |  |  | -- |  |  | -- |  |  | --
For the year ended December 31, 2012 (continued): |  |  |  |  | Reinsurance |  | Interest sensitive
|  |  |  |  |  | Other invested |  | ceded receivable- |  | contract liabilities
|  |  |  | Short-term |  | assets- other |  | embedded |  | embedded
|  |  |  | investments |  | equity securities |  | derivative |  | derivative
Balance January 1, 2012 | $ | -- |  | $ | 11,489 |  | $ | 4,945 |  | $ | (1,028,241)
| Total gains/losses (realized/unrealized) |  |  |  |  |  |  |  |  |  |  |
|  | Included in earnings, net: |  |  |  |  |  |  |  |  |  |  |
|  |  | Investment income, net of related expenses |  | (11) |  |  | -- |  |  | -- |  |  | --
|  |  | Investment related gains (losses), net |  | -- |  |  | 1,098 |  |  | -- |  |  | 104,613
|  |  | Claims & other policy benefits |  | -- |  |  | -- |  |  | -- |  |  | 770
|  |  | Interest credited |  | -- |  |  | -- |  |  | -- |  |  | (31,552)
|  |  | Policy acquisition costs and other insurance expenses |  | -- |  |  | -- |  |  | (449) |  |  | --
|  | Included in other comprehensive income |  | 28 |  |  | 843 |  |  | -- |  |  | --
| Purchases(1) |  | 22,014 |  |  | 108 |  |  | -- |  |  | (63,934)
| Sales(1) |  | -- |  |  | (3,788) |  |  | -- |  |  | --
| Settlements(1) |  | -- |  |  | -- |  |  | (4,496) |  |  | 105,983
| Transfers into Level 3 |  | -- |  |  | -- |  |  | -- |  |  | --
| Transfers out of Level 3 |  | -- |  |  | (9,750) |  |  | -- |  |  | --
Balance December 31, 2012 | $ | 22,031 |  | $ | -- |  | $ | -- |  | $ | (912,361)
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period |  |  |  |  |  |  |  |  |  |  |
|  | Included in earnings, net: |  |  |  |  |  |  |  |  |  |  |
|  |  | Investment income, net of related expenses | $ | (11) |  | $ | -- |  | $ | -- |  | $ | --
|  |  | Investment related gains (losses), net |  | -- |  |  | (183) |  |  | -- |  |  | 97,216
|  |  | Claims & other policy benefits |  | -- |  |  | -- |  |  | -- |  |  | 56
|  |  | Interest credited |  | -- |  |  | -- |  |  | -- |  |  | (129,828)
|  |  | Policy acquisition costs and other insurance expenses |  | -- |  |  | -- |  |  | (33) |  |  | --
(1) | The amount reported within purchases, sales, issuances and settlements is the purchase/issuance price (for purchases and issuances) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased/issued or sold/settled. Items purchased/issued and sold/settled in the same period are excluded from the rollforward.
For the year ended December 31, 2011: | Fixed maturity securities - available-for-sale
|  |  |  |  |  |  |  | Residential |  |  |  |  |  | Commercial
|  |  |  | Corporate |  |  | mortgage-backed |  |  | Asset-backed |  |  | mortgage-backed
|  |  |  | securities |  |  | securities |  |  | securities |  |  | securities
Balance January 1, 2011 | $ | 872,179 |  | $ | 183,291 |  | $ | 228,558 |  | $ | 147,556
| Total gains/losses (realized/unrealized) |  |  |  |  |  |  |  |  |  |  |
|  | Included in earnings, net: |  |  |  |  |  |  |  |  |  |  |
|  |  | Investment income, net of related expenses |  | 218 |  |  | 836 |  |  | 1,686 |  |  | 2,321
|  |  | Investment related gains (losses), net |  | 1,863 |  |  | (2,032) |  |  | (10,236) |  |  | (12,354)
|  |  | Claims & other policy benefits |  | -- |  |  | -- |  |  | -- |  |  | --
|  |  | Interest credited |  | -- |  |  | -- |  |  | -- |  |  | --
|  |  | Policy acquisition costs and other insurance expenses |  | -- |  |  | -- |  |  | -- |  |  | --
|  | Included in other comprehensive income |  | 21,011 |  |  | 4,580 |  |  | 3,902 |  |  | 8,060
| Purchases(1) |  | 305,401 |  |  | 6,478 |  |  | 65,467 |  |  | 7,683
| Issuances |  |  |  |  |  |  |  |  |  |  |
| Sales(1) |  | (48,653) |  |  | (21,178) |  |  | (27,844) |  |  | --
| Settlements(1) |  | (125,797) |  |  | (16,672) |  |  | (24,092) |  |  | (3,548)
| Transfers into Level 3 |  | 80,302 |  |  | 30,159 |  |  | 45,984 |  |  | 76,955
| Transfers out of Level 3 |  | (132,333) |  |  | (103,807) |  |  | (89,933) |  |  | (110,697)
Balance December 31, 2011 | $ | 974,191 |  | $ | 81,655 |  | $ | 193,492 |  | $ | 115,976
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period |  |  |  |  |  |  |  |  |  |  |
|  | Included in earnings, net: |  |  |  |  |  |  |  |  |  |  |
|  |  | Investment income, net of related expenses | $ | 162 |  | $ | 816 |  | $ | 1,595 |  | $ | 2,307
|  |  | Investment related gains (losses), net |  | (1,223) |  |  | (594) |  |  | (5,058) |  |  | (12,366)
|  |  | Claims & other policy benefits |  | -- |  |  | -- |  |  | -- |  |  | --
|  |  | Interest credited |  | -- |  |  | -- |  |  | -- |  |  | --
|  |  | Policy acquisition costs and other insurance expenses |  | -- |  |  | -- |  |  | -- |  |  | --
For the year ended December 31, 2011 (continued): | Fixed maturity securities - available-for-sale |  |  |
|  |  |  | Other foreign |  |  |
| State |  | government, |  | Funds withheld
|  |  |  | and political |  | supranational and |  | at interest-
|  |  |  | subdivision |  | foreign government- |  | embedded
|  |  |  | securities |  | sponsored enterprises |  | derivative
Balance January 1, 2011 | $ | 6,983 |  | $ | 6,736 |  | $ | (274,220)
| Total gains/losses (realized/unrealized) |  |  |  |  |  |  |  |
|  | Included in earnings, net: |  |  |  |  |  |  |  |
|  |  | Investment income, net of related expenses |  | 361 |  |  | 2 |  |  | --
|  |  | Investment related gains (losses), net |  | (15) |  |  | -- |  |  | (87,236)
|  |  | Claims & other policy benefits |  | -- |  |  | -- |  |  | --
|  |  | Interest credited |  | -- |  |  | -- |  |  | --
|  |  | Policy acquisition costs and other insurance expenses |  | -- |  |  | -- |  |  | --
|  | Included in other comprehensive income |  | 3,390 |  |  | 4 |  |  | --
| Purchases(1) |  | 2,334 |  |  | -- |  |  | --
| Sales(1) |  | -- |  |  | -- |  |  | --
| Settlements(1) |  | (88) |  |  | -- |  |  | --
| Transfers into Level 3 |  | 48,469 |  |  | 20 |  |  | --
| Transfers out of Level 3 |  | (51,061) |  |  | (6,762) |  |  | --
Balance December 31, 2011 | $ | 10,373 |  | $ | -- |  | $ | (361,456)
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period |  |  |  |  |  |  |  |
|  | Included in earnings, net: |  |  |  |  |  |  |  |
|  |  | Investment income, net of related expenses | $ | 361 |  | $ | -- |  | $ | --
|  |  | Investment related gains (losses), net |  | -- |  |  | -- |  |  | (87,236)
|  |  | Claims & other policy benefits |  | -- |  |  | -- |  |  | --
|  |  | Interest credited |  | -- |  |  | -- |  |  | --
|  |  | Policy acquisition costs and other insurance expenses |  | -- |  |  | -- |  |  | --
For the year ended December 31, 2011 (continued): | Other invested |  |  |  | Reinsurance |  | Interest sensitive
|  |  |  | assets- non- |  | Other invested |  | ceded receivable- |  | contract liabilities
|  |  |  | redeemable |  | assets- other |  | embedded |  | embedded
|  |  |  | preferred stock |  | equity securities |  | derivative |  | derivative
Balance January 1, 2011 | $ | 420 |  | $ | 16,416 |  | $ | 75,431 |  | $ | (721,485)
| Total gains/losses (realized/unrealized) |  |  |  |  |  |  |  |  |  |  |
|  | Included in earnings, net: |  |  |  |  |  |  |  |  |  |  |
|  |  | Investment income, net of related expenses |  | -- |  |  | -- |  |  | -- |  |  | --
|  |  | Investment related gains (losses), net |  | -- |  |  | 3,504 |  |  | -- |  |  | (224,184)
|  |  | Claims & other policy benefits |  | -- |  |  | -- |  |  | -- |  |  | (2,230)
|  |  | Interest credited |  | -- |  |  | -- |  |  | -- |  |  | (88,255)
|  |  | Policy acquisition costs and other insurance expenses |  | -- |  |  | -- |  |  | 9,421 |  |  | --
|  | Included in other comprehensive income |  | -- |  |  | (4,663) |  |  | -- |  |  | --
| Purchases(1) |  | -- |  |  | 797 |  |  | 6,201 |  |  | (71,505)
| Sales(1) |  | (420) |  |  | (4,565) |  |  | -- |  |  | --
| Settlements(1) |  | -- |  |  | -- |  |  | (86,108) |  |  | 79,418
| Transfers into Level 3 |  | -- |  |  | -- |  |  | -- |  |  | --
| Transfers out of Level 3 |  | -- |  |  | -- |  |  | -- |  |  | --
Balance December 31, 2011 | $ | -- |  | $ | 11,489 |  | $ | 4,945 |  | $ | (1,028,241)
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period |  |  |  |  |  |  |  |  |  |  |
|  | Included in earnings, net: |  |  |  |  |  |  |  |  |  |  |
|  |  | Investment income, net of related expenses | $ | -- |  | $ | -- |  | $ | -- |  | $ | --
|  |  | Investment related gains (losses), net |  | -- |  |  | -- |  |  | -- |  |  | (228,910)
|  |  | Claims & other policy benefits |  | -- |  |  | -- |  |  | -- |  |  | (2,346)
|  |  | Interest credited |  | -- |  |  | -- |  |  | -- |  |  | (167,673)
|  |  | Policy acquisition costs and other insurance expenses |  | -- |  |  | -- |  |  | 18,589 |  |  | --
(1) | The amount reported within purchases, sales, issuances and settlements is the purchase/issuance price (for purchases and issuances) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased/issued or sold/settled. Items purchased/issued and sold/settled in the same period are excluded from the rollforward.
For the year ended December 31, 2010: | Fixed maturity securities - available-for-sale
|  |  |  |  |  |  |  | Residential |  |  |  |  |  | Commercial
|  |  |  | Corporate |  |  | mortgage-backed |  |  | Asset-backed |  |  | mortgage-backed
|  |  |  | securities |  |  | securities |  |  | securities |  |  | securities
Balance January 1, 2010 | $ | 994,219 |  | $ | 144,457 |  | $ | 262,767 |  | $ | 329,559
| Total gains/losses (realized/unrealized) |  |  |  |  |  |  |  |  |  |  |
|  | Included in earnings, net: |  |  |  |  |  |  |  |  |  |  |
|  |  | Investment income, net of related expenses |  | 657 |  |  | 1,763 |  |  | 2,843 |  |  | 3,467
|  |  | Investment related gains (losses), net |  | 839 |  |  | (7,479) |  |  | (7,494) |  |  | (6,369)
|  |  | Claims & other policy benefits |  | -- |  |  | -- |  |  | -- |  |  | --
|  |  | Interest credited |  | -- |  |  | -- |  |  | -- |  |  | --
|  |  | Policy acquisition costs and other insurance expenses |  | -- |  |  | -- |  |  | -- |  |  | --
|  | Included in other comprehensive income |  | 34,319 |  |  | 26,808 |  |  | 31,340 |  |  | 22,907
| Purchases, issuances, sales and settlements(1) |  | 71,695 |  |  | (43,236) |  |  | (45,677) |  |  | 37,476
| Transfers into Level 3 |  | 126,133 |  |  | 102,939 |  |  | 78,880 |  |  | 73,653
| Transfers out of Level 3 |  | (355,683) |  |  | (41,961) |  |  | (94,101) |  |  | (313,137)
Balance December 31, 2010 | $ | 872,179 |  | $ | 183,291 |  | $ | 228,558 |  | $ | 147,556
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period |  |  |  |  |  |  |  |  |  |  |
|  | Included in earnings, net: |  |  |  |  |  |  |  |  |  |  |
|  |  | Investment income, net of related expenses | $ | 548 |  | $ | 1,592 |  | $ | 2,731 |  | $ | 3,449
|  |  | Investment related gains (losses), net |  | (594) |  |  | (4,637) |  |  | (4,052) |  |  | (6,563)
|  |  | Claims & other policy benefits |  | -- |  |  | -- |  |  | -- |  |  | --
|  |  | Interest credited |  | -- |  |  | -- |  |  | -- |  |  | --
|  |  | Policy acquisition costs and other insurance expenses |  | -- |  |  | -- |  |  | -- |  |  | --
For the year ended December 31, 2010 (continued): | Fixed maturity securities - available-for-sale |  |  |  |  |  |
|  |  |  |  |  |  | Other foreign |  |  |  |  |  |
|  |  |  | State |  | government, |  | Funds withheld |  |  |
|  |  |  | and political |  | supranational and |  | at interest- |  |  |
|  |  |  | subdivision |  | foreign government- |  | embedded |  | Short-term
|  |  |  | securities |  | sponsored enterprises |  | derivative |  | investments
Balance January 1, 2010 | $ | 12,080 |  | $ | 59,975 |  | $ | (434,494) |  | $ | 443
| Total gains/losses (realized/unrealized) |  |  |  |  |  |  |  |  |  |  |
|  | Included in earnings, net: |  |  |  |  |  |  |  |  |  |  |
|  |  | Investment income, net of related expenses |  | 118 |  |  | 2 |  |  | -- |  |  | --
|  |  | Investment related gains (losses), net |  | (14) |  |  | (10) |  |  | 160,274 |  |  | --
|  |  | Claims & other policy benefits |  | -- |  |  | -- |  |  | -- |  |  | --
|  |  | Interest credited |  | -- |  |  | -- |  |  | -- |  |  | --
|  |  | Policy acquisition costs and other insurance expenses |  | -- |  |  | -- |  |  | -- |  |  | --
|  | Included in other comprehensive income |  | 961 |  |  | 304 |  |  | -- |  |  | --
| Purchases, issuances, sales and settlements(1) |  | 34,841 |  |  | 1,416 |  |  | -- |  |  | 381
| Transfers into Level 3 |  | 1,820 |  |  | 2,178 |  |  | -- |  |  | --
| Transfers out of Level 3 |  | (42,823) |  |  | (57,129) |  |  | -- |  |  | (824)
Balance December 31, 2010 | $ | 6,983 |  | $ | 6,736 |  | $ | (274,220) |  | $ | --
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period |  |  |  |  |  |  |  |  |  |  |
|  | Included in earnings, net: |  |  |  |  |  |  |  |  |  |  |
|  |  | Investment income, net of related expenses | $ | 118 |  | $ | 6 |  | $ | -- |  | $ | --
|  |  | Investment related gains (losses), net |  | -- |  |  | -- |  |  | 160,274 |  |  | --
|  |  | Claims & other policy benefits |  | -- |  |  | -- |  |  | -- |  |  | --
|  |  | Interest credited |  | -- |  |  | -- |  |  | -- |  |  | --
|  |  | Policy acquisition costs and other insurance expenses |  | -- |  |  | -- |  |  | -- |  |  | --
For the year ended December 31, 2010 (continued): | Other invested |  |  |  | Reinsurance |  | Interest sensitive
|  |  |  | assets- non- |  | Other invested |  | ceded receivable- |  | contract liabilities
|  |  |  | redeemable |  | assets- other |  | embedded |  | embedded
|  |  |  | preferred stock |  | equity securities |  | derivative |  | derivative
Balance January 1, 2010 | $ | 6,775 |  | $ | 10,436 |  | $ | 68,873 |  | $ | (608,654)
| Total gains/losses (realized/unrealized) |  |  |  |  |  |  |  |  |  |  |
|  | Included in earnings, net: |  |  |  |  |  |  |  |  |  |  |
|  |  | Investment income, net of related expenses |  | -- |  |  | -- |  |  | -- |  |  | --
|  |  | Investment related gains (losses), net |  | 550 |  |  | -- |  |  | -- |  |  | (28,786)
|  |  | Claims & other policy benefits |  | -- |  |  | -- |  |  | -- |  |  | (872)
|  |  | Interest credited |  | -- |  |  | -- |  |  | -- |  |  | (52,569)
|  |  | Policy acquisition costs and other insurance expenses |  | -- |  |  | -- |  |  | 7,621 |  |  | --
|  | Included in other comprehensive income |  | 160 |  |  | 4,848 |  |  | -- |  |  | --
| Purchases, issuances, sales and settlements(1) |  | (5,146) |  |  | 1,132 |  |  | (1,063) |  |  | (30,604)
| Transfers into Level 3 |  | -- |  |  | -- |  |  | -- |  |  | --
| Transfers out of Level 3 |  | (1,919) |  |  | -- |  |  | -- |  |  | --
Balance December 31, 2010 | $ | 420 |  | $ | 16,416 |  | $ | 75,431 |  | $ | (721,485)
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period |  |  |  |  |  |  |  |  |  |  |
|  | Included in earnings, net: |  |  |  |  |  |  |  |  |  |  |
|  |  | Investment income, net of related expenses | $ | (1) |  | $ | -- |  | $ | -- |  | $ | --
|  |  | Investment related gains (losses), net |  | (32) |  |  | -- |  |  | -- |  |  | (28,786)
|  |  | Claims & other policy benefits |  | -- |  |  | -- |  |  | -- |  |  | (2,824)
|  |  | Interest credited |  | -- |  |  | -- |  |  | -- |  |  | (101,970)
|  |  | Policy acquisition costs and other insurance expenses |  | -- |  |  | -- |  |  | 7,621 |  |  | --
(1) | The amount reported within purchases, sales, issuances and settlements is the purchase/issuance price (for purchases and issuances) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased/issued or sold/settled. Items purchased/issued and sold/settled in the same period are excluded from the rollforward.
Financial Instruments Carrying Amounts And Estimated Fair Value [Table Text Block] |
December 31, 2012 |  |  |  | Estimated Fair |  | Fair Value Measurement Using:
|  |  | Carrying Value |  | Value |  |  | Level 1 |  | Level 2 |  | Level 3
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Mortgage loans on real estate | $ | 2,300,587 |  | $ | 2,426,688 |  | $ | -- |  | $ | -- |  | $ | 2,426,688
| Policy loans |  | 1,278,175 |  |  | 1,278,175 |  |  | -- |  |  | 1,278,175 |  |  | --
| Funds withheld at interest(1) |  | 5,837,359 |  |  | 6,362,324 |  |  | -- |  |  | -- |  |  | 6,362,324
| Cash and cash equivalents(2) |  | 684,028 |  |  | 684,028 |  |  | 684,028 |  |  | -- |  |  | --
| Short-term investments(2) |  | 48,951 |  |  | 48,951 |  |  | 48,951 |  |  | -- |  |  | --
| Other invested assets(2) |  | 596,336 |  |  | 626,358 |  |  | -- |  |  | 32,250 |  |  | 594,108
| Accrued investment income |  | 201,344 |  |  | 201,344 |  |  | -- |  |  | 201,344 |  |  | --
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Interest-sensitive contract liabilities(1) | $ | 11,566,962 |  | $ | 11,926,339 |  | $ | -- |  | $ | -- |  | $ | 11,926,339
| Long-term debt |  | 1,815,253 |  |  | 2,014,062 |  |  | -- |  |  | -- |  |  | 2,014,062
| Collateral finance facility |  | 652,010 |  |  | 456,050 |  |  | -- |  |  | -- |  |  | 456,050
December 31, 2011: |  |  |  | Estimated Fair |  |  |  |  |  |  |  |  |
|  |  | Carrying Value |  | Value |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Mortgage loans on real estate | $ | 991,731 |  | $ | 1,081,924 |  |  |  |  |  |  |  |  |
| Policy loans |  | 1,260,400 |  |  | 1,260,400 |  |  |  |  |  |  |  |  |
| Funds withheld at interest(1) |  | 5,771,880 |  |  | 6,041,984 |  |  |  |  |  |  |  |  |
| Cash and cash equivalents(2) |  | 458,348 |  |  | 458,348 |  |  |  |  |  |  |  |  |
| Short-term investments(2) |  | 41,895 |  |  | 41,895 |  |  |  |  |  |  |  |  |
| Other invested assets(2) |  | 500,681 |  |  | 503,293 |  |  |  |  |  |  |  |  |
| Accrued investment income |  | 144,334 |  |  | 144,334 |  |  |  |  |  |  |  |  |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Interest-sensitive contract liabilities(1) | $ | 6,203,001 |  | $ | 6,307,779 |  |  |  |  |  |  |  |  |
| Long-term debt |  | 1,414,688 |  |  | 1,462,329 |  |  |  |  |  |  |  |  |
| Collateral finance facility |  | 652,032 |  |  | 390,900 |  |  |  |  |  |  |  |  |
(1) | Carrying values presented herein differ from those presented in the consolidated balance sheets because certain items within the respective financial statement caption are embedded derivatives and are measured at fair value on a recurring basis.
(2) | Carrying values presented herein differ from those presented in the consolidated balance sheets because certain items within the respective financial statement caption are measured at fair value on a recurring basis.
Fair Value Assets Measured On Nonrecurring Basis [Text Block] |
|  | Years Ended December 31,
|  | 2012 |  | 2011
|  | Carrying Value |  | Estimated Fair |  | Net |  | Carrying Value |  | Estimated Fair |  | Net
|  | Prior to |  | Value After |  | Investment |  | Prior to |  | Value After |  | Investment
|  | Measurement |  | Measurement |  | Gains (Losses) |  | Measurement |  | Measurement |  | Gains (Losses)
| Mortgage loans(1) | $ | 24,295 |  | $ | 20,480 |  | $ | (3,815) |  | $ | 27,227 |  | $ | 21,220 |  | $ | (6,007)
| Limited partnership interests(2) |  | 25,191 |  |  | 16,944 |  |  | (8,247) |  |  | -- |  |  | -- |  |  | --
| Real estate investments(3) |  | 6,593 |  |  | 4,500 |  |  | (2,093) |  |  | -- |  |  | -- |  |  | --
(1) | Mortgage loans — The impaired mortgage loans presented above were written down to their estimated fair values at the date the impairments were recognized and are reported as losses above. Subsequent improvements in estimated fair value on previously impaired loans recorded through a reduction in the previously established valuation allowance are reported as gains above. Nonrecurring fair value adjustments on mortgage loans are based on the fair value of underlying collateral or discounted cash flows and were classified as Level 3 in the fair value hierarchy.
(2) | Limited partnership interests — The impaired investments presented above were accounted for using the cost method. Impairments on these cost method investments were recognized at estimated fair value determined using the net asset values of the Company's ownership interest as provided in the financial statements of the investees. The valuation of these investments is considered Level 3 in the fair value hierarchy due to the limited activity and price transparency inherent in the market for such investments.
(3) | Real estate investments – The impaired real estate investments presented above were written down to their estimated fair value at the date of impairment and are reported as losses above. The impairments were based on third-party appraisal values obtained and reviewed by the Company.

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- Definition Tabular disclosure of assets and liabilities by class, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). The disclosures that may be required or desired include: (a) the fair value measurements recorded during the period and the reasons for the measurements and (b) 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 or liabilities (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). Where the quoted price in an active market for the identical liability is not available, the Level 1 input is the quoted price of an identical liability when traded as an asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 33 -Subparagraph a, 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 820 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19296-110258 + Details
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