Note 3. Income Taxes (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Deferred Federal Income Tax Expense (Benefit)	$ 22,470,000	$ 1,801,000	$ 60,790,000	$ 9,729,000
Deferred Tax Assets, Gross	$ 127,000,000		$ 127,000,000