Note 13 - Income Taxes Reconciliation of Taxes from Statutory Rate to Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation from Statutory Rate to Provision (Benefit) for Income Taxes [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	35.00%	35.00%	35.00%
(Benefit) provision for income taxes computed at the statutory tax rate	$ 153,240	$ 142,504	$ (60,671)
Tax-exempt municipal bond interest and dividends received deduction (net of proration)	(1,085)	(1,286)	(1,494)
Deferred inventory adjustment related to fair value of derivatives and other financial instruments	(6,674)	0	0
Foreign tax (benefit) expense	357	270	(1)
State tax expense (benefit)	(7,619)	(451)	949
Unrecognized tax expense (benefit)	5,233	407	1,696
Valuation allowance	11,931	(995,008)	24,546
Other, net	907	1,146	3,480
Income tax (benefit) provision	$ 156,290	$ (852,418)	$ (31,495)