v2.3.0.15

Investments (Schedule Of Contractual Maturities Of Fixed Maturity Investments) (Details) (USD $) In Thousands | Sep. 30, 2011 | Dec. 31, 2010
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Investments |  |
Trading, Amortized Cost, Due in less than one year | $ 167,947 |
Trading, Amortized Cost, Due after one through five years | 1,876,919 |
Trading, Amortized Cost, Due after five through ten years | 815,283 |
Trading, Amortized Cost, Due after ten years | 127,583 |
Trading, Amortized Cost, Mortgage backed | 669,592 |
Trading, Amortized Cost, Asset backed | 14,404 |
Trading, Amortized Cost | 3,671,728 | 3,859,442
Trading, Fair Value, Due in less than one year | 168,432 |
Trading, Fair Value, Due after one through five years | 1,880,559 |
Trading, Fair Value, Due after five through ten years | 817,714 |
Trading, Fair Value, Due after ten years | 131,180 |
Trading, Fair Value, Mortgage backed | 675,399 |
Trading, Fair Value, Asset backed | 14,385 |
Trading, Fair Value | 3,687,669 | 3,871,780
Available for Sale, Amortized Cost, Due in less than one year | 174 |
Available for Sale, Amortized Cost, Due after one through five years | 11,869 |
Available for Sale, Amortized Cost, Due after five through ten years | 13,172 |
Available for Sale, Amortized Cost, Due after ten years | 6,090 |
Available for Sale, Amortized Cost, Mortgage-backed | 102,985 |
Available for Sale, Amortized Cost, Asset-backed | 4,993 |
Available for Sale, Amortized Cost | 139,283 | 225,549
Available for Sale, Fair Value, Due in less than one year | 125 |
Available for Sale, Fair Value, Due after one through five years | 12,857 |
Available for Sale, Fair Value, Due after five through ten years | 13,482 |
Available for Sale, Fair Value, Due after ten years | 6,520 |
Available for Sale, Fair Value, Mortgage-backed | 111,761 |
Available for Sale, Fair Value, Asset-backed | 5,224 |
Available for Sale, Fair Value | 149,969 | 244,917
Debt Securities, Amortized Cost, Due in less than one year | 168,121 |
Debt Securities, Amortized Cost, Due after one through five years | 1,888,788 |
Debt Securities, Amortized Cost, Due after five through ten years | 828,455 |
Debt Securities, Amortized Cost, Due after ten years | 133,673 |
Debt Securities, Amortized Cost, Mortgage backed | 772,577 |
Debt Securities, Amortized Cost, Asset backed | 19,397 |
Debt Securities, Amortized Cost | 3,811,011 |
Debt Securities, Fair Value, Due in less than one year | 168,557 |
Debt Securities, Fair Value, Due after one through five years | 1,893,416 |
Debt Securities, Fair Value, Due after five through ten years | 831,196 |
Debt Securities, Fair Value, Due after ten years | 137,700 |
Debt Securities, Fair Value, Mortgage backed | 787,160 |
Debt Securities, Fair Value, Asset backed | 19,609 |
Debt Securities, Fair Value | $ 3,837,638 |

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