Note 17 - Income Taxes (Detail) - Provision for Income Taxes (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Current income tax expense
Federal	$ 83,569	$ 91,325	$ 87,402
State	1	11	(573)
Total current	83,570	91,336	86,829
Deferred income tax (benefit)	24,469	(32,840)	3,796
Total provision	$ 108,039	$ 58,496	$ 90,625