| COMPONENTS OF RESERVE FOR LOSSES AND LOSS EXPENSES [Table Text Block] |
| Our reserve for losses and loss expenses comprise the following: | | | | | | | | | | | | | | | | | | As of December 31, | | 2011 | | | 2010 | | | | | | | | | | | | | Reserve for reported losses and loss expenses | $ | 3,019,372 | | $ | 2,097,484 | | | | Reserve for losses incurred but not reported | | 5,405,673 | | | 4,934,891 | | | | Reserve for losses and loss expenses | $ | 8,425,045 | | $ | 7,032,375 | | | | | | | | | | |
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| RECONCILIATION OF BEGINNING AND ENDING GROSS UNPAID LOSSES AND LOSS EXPENSES [Table Text Block] |
| The following table shows a reconciliation of our beginning and ending gross unpaid losses and loss expenses for the periods indicated: | | | | | | | | | | | | | | | | | | | | | | Year ended December 31, | | | 2011 | | | 2010 | | | 2009 | | | | | | | | | | | | | | | | | Gross reserve for losses and loss expenses, beginning of period | | $ | 7,032,375 | | $ | 6,564,133 | | $ | 6,244,783 | | | | Less reinsurance recoverable on unpaid losses, beginning of period | | | (1,540,633) | | | (1,381,058) | | | (1,314,551) | | | | Net reserve for losses and loss expenses, beginning of period | | | 5,491,742 | | | 5,183,075 | | | 4,930,232 | | | | | | | | | | | | | | | | | Net incurred losses and loss expenses related to: | | | | | | | | | | | | | Current year | | | 2,932,513 | | | 1,990,187 | | | 1,847,044 | | | | Prior years | | | (257,461) | | | (313,055) | | | (423,172) | | | | | | | 2,675,052 | | | 1,677,132 | | | 1,423,872 | | | | Net paid losses and loss expenses related to: | | | | | | | | | | | | | Current year | | | (509,075) | | | (300,293) | | | (271,011) | | | | Prior years | | | (953,035) | | | (1,042,890) | | | (982,036) | | | | | | | (1,462,110) | | | (1,343,183) | | | (1,253,047) | | | | | | | | | | | | | | | | | Foreign exchange and other | | | (16,462) | | | (25,282) | | | 82,018 | | | | | | | | | | | | | | | | | Net reserve for losses and loss expenses, end of period | | | 6,688,222 | | | 5,491,742 | | | 5,183,075 | | | | Reinsurance recoverable on unpaid losses, end of period | | | 1,736,823 | | | 1,540,633 | | | 1,381,058 | | | | Gross reserve for losses and loss expenses, end of period | | $ | 8,425,045 | | $ | 7,032,375 | | $ | 6,564,133 | | | | | | | | | | | | | | |
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