Note 3. Income Taxes (Detail) - Major components of income tax provision (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Current:
Federal	$ 3,854	$ 4,392	$ 7,965	$ 5,751
State	886	1,772	1,364	1,941
Foreign	115	115	344	344
Total current income tax provision	4,855	6,279	9,673	8,036
Deferred:
Federal and state deferred income tax provision	22,470	1,801	60,790	9,729
Discrete benefit for change in valuation allowance attributable to future periods				(7,659)
Total deferred income tax provision	22,470	1,801	60,790	2,070
Total income tax provision	$ 27,325	$ 8,080	$ 70,463	$ 10,106