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UNAUDITED CONDENSED QUARTERLY FINANCIAL DATA (TABLES) | 12 Months Ended
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Dec. 31, 2011
UNAUDITED CONDENSED QUARTER FINANCIAL INFORMATION [Abstract] |
Summary of quarterly financial results [Table Text Block] |
The following is an unaudited summary of our quarterly financial results:
| Quarters ended | Mar 31 |  | Jun 30 |  | Sep 30 |  | Dec 31 |
| 2011 |  |  |  |  |  |  |  |  |  |  |  |
| Net premiums earned | $ | 788,201 |  | $ | 840,014 |  | $ | 839,992 |  | $ | 846,753 |
| Net investment income |  | 110,655 |  |  | 100,018 |  |  | 49,396 |  |  | 102,362 |
| Net realized investment gains (losses) |  | 30,144 |  |  | 37,477 |  |  | 57,557 |  |  | (3,738) |
| Underwriting income (loss) |  | (461,305) |  |  | 28,974 |  |  | 90,029 |  |  | 15,076 |
| Net income (loss) available to common shareholders |  | (383,760) |  |  | 101,068 |  |  | 212,058 |  |  | 80,064 |
| Earnings (loss) per common share - basic | $ | (3.39) |  | $ | 0.81 |  | $ | 1.68 |  | $ | 0.63 |
| Earnings (loss) per common share - diluted | $ | (3.39) |  | $ | 0.79 |  | $ | 1.66 |  | $ | 0.63 |
| 2010 |  |  |  |  |  |  |  |  |  |  |  |
| Net premiums earned | $ | 696,192 |  | $ | 735,027 |  | $ | 758,873 |  | $ | 757,318 |
| Net investment income |  | 104,619 |  |  | 82,584 |  |  | 111,800 |  |  | 107,889 |
| Net realized investment gains |  | 16,176 |  |  | 24,619 |  |  | 76,531 |  |  | 77,772 |
| Underwriting income |  | 28,446 |  |  | 120,836 |  |  | 127,376 |  |  | 132,546 |
| Net income available to common shareholders |  | 111,812 |  |  | 204,852 |  |  | 238,842 |  |  | 264,343 |
| Earnings per common share - basic | $ | 0.87 |  | $ | 1.68 |  | $ | 1.99 |  | $ | 2.26 |
| Earnings per common share - diluted | $ | 0.79 |  | $ | 1.51 |  | $ | 1.78 |  | $ | 1.99 |

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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 270 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (a)-(j) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6952194&loc=d3e1280-108306 + Details
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