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Note 3. Income Taxes (Detail) (USD $) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011
Deferred Federal Income Tax Expense (Benefit) | $ (5,627,000) | $ 22,470,000 | $ (1,930,000) | $ 60,790,000
Deferred Tax Assets, Net of Valuation Allowance | $ 117,800,000 |  | $ 117,800,000 |

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