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