v2.4.0.6

INVESTMENTS (DETAILS 2) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2011 | Dec. 31, 2010
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Schedule Of Contractual Maturities [Line Items] |  |
Due in one year or less (amortized cost) | $ 543,100 | $ 476,807
Due after one year through five years (amortized cost) | 4,694,832 | 4,096,477
Due after five years through ten years (amortized cost) | 1,779,811 | 1,605,419
Due after ten years (amortized cost) | 119,926 | 221,631
Total fixed maturities with single maturity date (amortized cost) | 7,137,669 | 6,400,334
Total (amortized cost) | 10,821,338 | 10,346,243
Due in one year or less (fair value) | 539,009 | 489,190
Due after one year through five years (fair value) | 4,685,866 | 4,144,144
Due after five years through ten years (fair value) | 1,845,054 | 1,655,061
Due after ten years (fair value) | 123,091 | 220,090
Total fixed maturities with a single maturity date (fair value) | 7,193,020 | 6,508,485
Fair Value (fixed maturities) | 10,940,100 | 10,482,897
Due in one year or less (% of total fair value) | 4.90% | 4.70%
Due after one year through five years (% of total fair value) | 42.80% | 39.50%
Due after five years through ten years (% of total fair value) | 16.90% | 15.80%
Due after ten years (% of total fair value) | 1.10% | 2.10%
Fixed maturities with single maturity date (% of total fair value) | 65.70% | 62.10%
% of Total Fair Value | 100.00% | 100.00%
Agency RMBS [Member] |  |
Schedule Of Contractual Maturities [Line Items] |  |
Fixed maturities without a single maturity date (amortized cost) | 2,568,053 | 2,571,124
Total (amortized cost) | 2,568,053 | 2,571,124
Fixed maturities without a single maturity date (fair value) | 2,636,634 | 2,593,582
Fair Value (fixed maturities) | 2,636,634 | 2,593,582
Fixed maturities without a single maturity date (% of total fair value) | 24.10% | 24.70%
CMBS [Member] |  |
Schedule Of Contractual Maturities [Line Items] |  |
Fixed maturities without a single maturity date (amortized cost) | 298,138 | 454,288
Total (amortized cost) | 298,138 | 454,288
Fixed maturities without a single maturity date (fair value) | 312,691 | 474,785
Fair Value (fixed maturities) | 312,691 | 474,785
Fixed maturities without a single maturity date (% of total fair value) | 2.90% | 4.50%
Non-Agency RMBS [Member] |  |
Schedule Of Contractual Maturities [Line Items] |  |
Fixed maturities without a single maturity date (amortized cost) | 177,529 | 252,460
Total (amortized cost) | 177,529 | 252,460
Fixed maturities without a single maturity date (fair value) | 165,713 | 244,202
Fair Value (fixed maturities) | 165,713 | 244,202
Fixed maturities without a single maturity date (% of total fair value) | 1.50% | 2.40%
ABS [Member] |  |
Schedule Of Contractual Maturities [Line Items] |  |
Fixed maturities without a single maturity date (amortized cost) | 639,949 | 668,037
Total (amortized cost) | 639,949 | 668,037
Fixed maturities without a single maturity date (fair value) | 632,042 | 661,843
Fair Value (fixed maturities) | $ 632,042 | $ 661,843
Fixed maturities without a single maturity date (% of total fair value) | 5.80% | 6.30%

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- Definition For an unclassified balance sheet, total of debt securities categorized neither as held-to-maturity nor trading expressed as a percentage of the total. Such securities are reported at fair value; unrealized gains and losses of such securities are excluded from earnings and included in other comprehensive income, a separate component of shareholders' equity, unless the Available-for-sale Security is designated as a hedge or is determined to have had an other than temporary decline in fair value below its amortized cost basis. All or a portion of the unrealized holding gain or loss of an Available-for-sale Security that is designated as being hedged in a fair value hedge shall be recognized in earnings during the period of the hedge, as should other than temporary declines in fair value below costs basis. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant