Note 3. Income Taxes (Detail) - Major components of income tax provision (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Current:
Federal	$ 4,111	$ 1,530	$ 4,111	$ 1,359
State	478	230	478	169
Foreign	115	115	230	230
Total current income tax provision	4,704	1,875	4,819	1,758
Deferred:
Federal and state deferred income tax provision	14,938	6,380	38,319	7,928
Discrete benefit for change in valuation allowance attributable to future periods				(7,660)
Total deferred income tax provision	14,938	6,380	38,319	268
Total income tax provision	$ 19,642	$ 8,255	$ 43,138	$ 2,026