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Basis of Presentation (Tables) | 6 Months Ended
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Jun. 30, 2012
Basis of Presentation [Abstract] |
Summary of financial statement amounts previously reported | As a result of the adopted accounting change, net income (loss) per share (basic and diluted) did not change. Other financial statement amounts previously reported were revised as shown below:
|  | As of December 31, |
|  | 2011 |  |  | 2010 |
Total shareholders’ equity |  |  |  |  |  |  |  |
As previously reported |  | $ | 1,086,926 |  |  | $ | 880,007 |
Effect of change in accounting principle, net of taxes: |  |  |  |  |  |  |  |
Retained earnings |  |  | (34,425 | ) |  |  | (34,447 | )
Accumulated other comprehensive income (loss), net of taxes (Net unrealized gains and losses on fixed maturities and equity securities) |  |  | 2,852 |  |  |  | 1,531 |
As adjusted |  | $ | 1,055,353 |  |  | $ | 847,091 |
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, 2011 |  |  | June 30, 2011 |
Net income (loss) |  |  |  |  |  |  |  |
As previously reported |  | $ | (11,817 | ) |  | $ | 14,124 |
Effect of change in accounting principle, net of taxes |  |  | (34 | ) |  |  | (168 | )
As adjusted |  | $ | (11,851 | ) |  | $ | 13,956 |

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