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Adoption of Accounting Pronouncements (Income Statement Statement) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011
Policy acquisition costs | $ 131,219 | $ 115,163 | $ 259,177 | $ 230,207
Deferred income tax expense | (480) | (4,677) | (2,560) | (3,295)
Net income | 288 | 1,467 | 18,381 | 21,967
Basic net income per share | $ 0.01 | $ 0.03 | $ 0.34 | $ 0.41
Diluted net income per share | $ 0.01 | $ 0.03 | $ 0.33 | $ 0.40
As Previously Reported [Member] |  |  |  |
Policy acquisition costs |  | 113,843 |  | 227,273
Deferred income tax expense |  | (4,215) |  | (2,268)
Net income |  | 2,325 |  | 23,874
Basic net income per share |  | $ 0.04 |  | $ 0.44
Diluted net income per share |  | $ 0.04 |  | $ 0.43
Add: Adjustment for the cumulative effect on prior years of applying retroactively the new method of accounting for deferred policy acquisition costs [Member] |  |  |  |
Policy acquisition costs |  | 1,320 |  | 2,934
Deferred income tax expense |  | (462) |  | (1,027)
Net income |  | $ (858) |  | $ (1,907)
Basic net income per share |  | $ (0.01) |  | $ (0.03)
Diluted net income per share |  | $ (0.01) |  | $ (0.03)

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