Note 3. Income Taxes (Detail) - Major components of income tax provision (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Current:
Federal	$ 5,102	$ 3,854	$ 8,630	$ 7,965
State	425	886	978	1,364
Foreign	114	115	344	344
Total current income tax provision	5,641	4,855	9,952	9,673
Deferred:
Federal and state deferred income tax provision (benefit)	(5,627)	22,470	(1,930)	60,790
Total income tax provision	$ 14	$ 27,325	$ 8,022	$ 70,463