v2.4.0.6

FAIR VALUE MEASUREMENTS (TABLES) | 12 Months Ended
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Dec. 31, 2011
Fair Value Disclosures [Abstract] |
CLO - EQUITIES SIGNIFICANT VALUATION MODEL INPUTS [Table Text Block] |
| At December 31, |  |  |  |  | 2011 |  | 2010 |
| Default rates | 4.0% - 5.0% |  | 3.8% - 5.0% |
| Loss severity rate | 53.5% |  | 65.0% |
| Collateral spreads | 2.6% - 4.2% |  | 2.4% - 4.2% |
| Estimated maturity dates | 2.5 - 5.2 years |  | 1.5 - 10.5 years |
The changes made to the above significant inputs in 2011 did not impact significantly the total change in fair value of the CLO - Equities recognized in earnings.
FINANCIAL INSTRUMENTS MEASURED AT FAIR VALUE ON A RECURRING BASIS [Table Text Block] |
The table below presents the financial instruments measured at fair value on a recurring basis.
|  | Quoted Prices in |  | Significant |  | Significant |  |  |  |
|  | Active Markets for |  | Other Observable |  | Unobservable |  |  |  |
|  | Identical Assets |  | Inputs |  | Inputs |  | Total Fair |
|  | (Level 1) |  | (Level 2) |  | (Level 3) |  | Value |
| At December 31, 2011 |  |  |  |  |  |  |  |  |  |  |  |
| Assets |  |  |  |  |  |  |  |  |  |  |  |
| Fixed maturities |  |  |  |  |  |  |  |  |  |  |  |
| U.S. government and agency | $ | 765,519 |  | $ | 382,748 |  | $ | - |  | $ | 1,148,267 |
| Non-U.S. government |  | - |  |  | 1,212,451 |  |  | - |  |  | 1,212,451 |
| Corporate debt |  | - |  |  | 3,608,041 |  |  | 1,550 |  |  | 3,609,591 |
| Agency RMBS |  | - |  |  | 2,636,634 |  |  | - |  |  | 2,636,634 |
| CMBS |  | - |  |  | 312,691 |  |  | - |  |  | 312,691 |
| Non-Agency RMBS |  | - |  |  | 165,713 |  |  | - |  |  | 165,713 |
| ABS |  | - |  |  | 582,714 |  |  | 49,328 |  |  | 632,042 |
| Municipals |  | - |  |  | 1,222,711 |  |  | - |  |  | 1,222,711 |
|  |  | 765,519 |  |  | 10,123,703 |  |  | 50,878 |  |  | 10,940,100 |
| Equity securities |  | 561,436 |  |  | 116,124 |  |  | - |  |  | 677,560 |
| Other investments |  | - |  |  | 286,516 |  |  | 412,804 |  |  | 699,320 |
| Other assets (see Note 7) |  | - |  |  | 38,175 |  |  | - |  |  | 38,175 |
| Total | $ | 1,326,955 |  | $ | 10,564,518 |  | $ | 463,682 |  | $ | 12,355,155 |
| Liabilities |  |  |  |  |  |  |  |  |  |  |  |
| Other liabilities (see Note 7) | $ | - |  | $ | 2,035 |  | $ | - |  | $ | 2,035 |
| At December 31, 2010 |  |  |  |  |  |  |  |  |  |  |  |
| Assets |  |  |  |  |  |  |  |  |  |  |  |
| Fixed maturities |  |  |  |  |  |  |  |  |  |  |  |
| U.S. government and agency | $ | 588,281 |  | $ | 271,839 |  | $ | - |  | $ | 860,120 |
| Non-U.S. government |  | - |  |  | 772,798 |  |  | - |  |  | 772,798 |
| Corporate debt |  | - |  |  | 4,161,358 |  |  | 1,550 |  |  | 4,162,908 |
| Agency RMBS |  | - |  |  | 2,593,582 |  |  | - |  |  | 2,593,582 |
| CMBS |  | - |  |  | 474,785 |  |  | - |  |  | 474,785 |
| Non-Agency RMBS |  | - |  |  | 224,524 |  |  | 19,678 |  |  | 244,202 |
| ABS |  | - |  |  | 618,665 |  |  | 43,178 |  |  | 661,843 |
| Municipals |  | - |  |  | 712,659 |  |  | - |  |  | 712,659 |
|  |  | 588,281 |  |  | 9,830,210 |  |  | 64,406 |  |  | 10,482,897 |
| Equity securities |  | 271,451 |  |  | 77,803 |  |  | - |  |  | 349,254 |
| Other investments |  | - |  |  | - |  |  | 519,296 |  |  | 519,296 |
| Other assets (see Note 7) |  | - |  |  | 6,641 |  |  | - |  |  | 6,641 |
| Total | $ | 859,732 |  | $ | 9,914,654 |  | $ | 583,702 |  | $ | 11,358,088 |
| Liabilities |  |  |  |  |  |  |  |  |  |  |  |
| Other liabilities (see Note 7) | $ | - |  | $ | 14,986 |  | $ | - |  | $ | 14,986 |
During 2011 and 2010, we had no transfers between Levels 1 and 2.
CHANGES IN LEVEL 3 FINANCIAL INSTRUMENTS MEASURED AT FAIR VALUE ON A RECURRING BASIS [Table Text Block] |
Level 3 financial instruments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
The following tables present changes in Level 3 for financial instruments measured at fair value on a recurring basis for the periods indicated: |
|  |  | Fixed Maturities |  |  |  |  |  |  |
|  |  | Corporate |  |  |  |  |  | Non-Agency |  |  |  |  |  |  |  |  | Other |  |  | Total |
|  |  | Debt |  |  | CMBS |  |  | RMBS |  |  | ABS |  |  | Total |  |  | Investments |  |  | Assets |
| Year ended December 31, 2011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Balance at beginning of period | $ | 1,550 |  | $ | - |  | $ | 19,678 |  | $ | 43,178 |  | $ | 64,406 |  | $ | 519,296 |  | $ | 583,702 |
| Total net realized and unrealized gains |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| included in net income(1) |  | - |  |  | - |  |  | - |  |  | - |  |  | - |  |  | 74,497 |  |  | 74,497 |
| Total net realized and unrealized losses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| included in net income(1) |  | - |  |  | - |  |  | - |  |  | - |  |  | - |  |  | (43,498) |  |  | (43,498) |
| Change in net unrealized gains included |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| in other comprehensive income |  | - |  |  | - |  |  | 123 |  |  | 5,289 |  |  | 5,412 |  |  | - |  |  | 5,412 |
| Change in net unrealized losses included |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| in other comprehensive income |  | - |  |  | - |  |  | (60) |  |  | (937) |  |  | (997) |  |  | - |  |  | (997) |
| Purchases |  | - |  |  | - |  |  | - |  |  | - |  |  | - |  |  | 195,000 |  |  | 195,000 |
| Sales |  | - |  |  | - |  |  | - |  |  | - |  |  | - |  |  | (25,268) |  |  | (25,268) |
| Settlements / distributions |  | - |  |  | - |  |  | (2,046) |  |  | (93) |  |  | (2,139) |  |  | (45,720) |  |  | (47,859) |
| Transfers into Level 3 |  | - |  |  | - |  |  | - |  |  | 1,891 |  |  | 1,891 |  |  | - |  |  | 1,891 |
| Transfers out of Level 3 |  | - |  |  | - |  |  | (17,695) |  |  | - |  |  | (17,695) |  |  | (261,503) |  |  | (279,198) |
| Balance at end of period | $ | 1,550 |  | $ | - |  | $ | - |  | $ | 49,328 |  | $ | 50,878 |  | $ | 412,804 |  | $ | 463,682 |
| Level 3 gains / losses included in |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| earnings attributable to the change |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| in unrealized gains /losses relating |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| to those assets held at the |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| reporting date | $ | - |  | $ | - |  | $ | - |  | $ | - |  | $ | - |  | $ | 31,855 |  | $ | 31,855 |
| Year ended December 31, 2010 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Balance at beginning of period | $ | 18,130 |  | $ | 2,409 |  | $ | 6,639 |  | $ | 43,585 |  | $ | 70,763 |  | $ | 520,188 |  | $ | 590,951 |
| Total net realized and unrealized gains |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| included in net income(1) |  | - |  |  | - |  |  | - |  |  | - |  |  | - |  |  | 60,969 |  |  | 60,969 |
| Total net realized and unrealized losses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| included in net income(1) |  | (1,550) |  |  | (119) |  |  | (581) |  |  | (1,134) |  |  | (3,384) |  |  | - |  |  | (3,384) |
| Change in net unrealized gains included |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| in other comprehensive income |  | 2,201 |  |  | 1,273 |  |  | 1,825 |  |  | 3,361 |  |  | 8,660 |  |  | - |  |  | 8,660 |
| Change in net unrealized losses included |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| in other comprehensive income |  | (34) |  |  | (238) |  |  | (27) |  |  | (71) |  |  | (370) |  |  | - |  |  | (370) |
| Purchases |  | - |  |  | 3,474 |  |  | 20,230 |  |  | 4,000 |  |  | 27,704 |  |  | 65,000 |  |  | 92,704 |
| Sales |  | (12) |  |  | (206) |  |  | (211) |  |  | (2,004) |  |  | (2,433) |  |  | (99,822) |  |  | (102,255) |
| Settlements / distributions |  | - |  |  | (694) |  |  | (1,832) |  |  | (369) |  |  | (2,895) |  |  | (27,039) |  |  | (29,934) |
| Transfers into Level 3 |  | - |  |  | - |  |  | 781 |  |  | - |  |  | 781 |  |  | - |  |  | 781 |
| Transfers out of Level 3 |  | (17,185) |  |  | (5,899) |  |  | (7,146) |  |  | (4,190) |  |  | (34,420) |  |  | - |  |  | (34,420) |
| Balance at end of period | $ | 1,550 |  | $ | - |  | $ | 19,678 |  | $ | 43,178 |  | $ | 64,406 |  | $ | 519,296 |  | $ | 583,702 |
| Level 3 gains / losses included in |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| earnings attributable to the change |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| in unrealized gains /losses relating |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| to those assets held at the |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| reporting date | $ | (1,550) |  | $ | - |  | $ | - |  | $ | - |  | $ | (1,550) |  | $ | 60,969 |  | $ | 59,419 |
(1) Realized gains and losses on fixed maturities are included in net realized investment gains (losses). Realized gains and (losses) on other investments are included in net investment income.

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- Definition Tabular disclosure of quantitative information about the inputs used in the fair value measurement of assets. This disclosure may include, but is not limited to, the fair value of the asset, valuation technique used to measure fair value, the inputs used to measure fair value, the ranges of the inputs, and the weighted averages of the inputs. + References No definition available. + Details
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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, 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, issuances, 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 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. 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=6925170&loc=d3e19279-110258 Reference 3: 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=6925170&loc=d3e19207-110258 + 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 -Topic 820 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19190-110258 + Details
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