Note 10 - Income Taxes Schedule of Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Current (benefit) provision	$ 4,546	$ 120	$ (26,575)
Deferred income tax (benefit) expense	170,887	156,170	(825,843)
Income tax (benefit) provision	$ 175,433	$ 156,290	$ (852,418)