Note 18 - Income Taxes (Details) - Significant Components of Deferred Income Tax Expense (Benefit) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2011	Dec. 31, 2012 Revised [Member]
Note 18 - Income Taxes (Details) - Significant Components of Deferred Income Tax Expense (Benefit) [Line Items]
Deferred tax expense (exclusive of the effect of other components listed below)	$ (71,052)	$ 4,045	$ 23,802
Write-off of power plants			(90,720)
Usage (benefit) of operating loss carryforwards — U.S.	11,672	(35,575)	26,907
Change in valuation allowance	(1,787)	61,500	16,877
Change in foreign income tax	10,458	5,041	8,257
Change in lease transaction	974	1,027	1,170
Change in tax monetization transaction	46,051	(4,975)	5,353
Change in intangible drilling costs	15,091	18,592	14,133
Benefit of production tax credits and alternative minimum tax credits	(949)	(11,594)	(10,515)
Total	$ 10,458	$ 38,061	$ (4,736)