Note 19 - Income Taxes - Net Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net foreign deferred taxes, primarily depreciation	$ (35,382)	$ (32,654)
Depreciation	148,419	87,943
Intangible drilling costs	(112,762)	(102,013)
Net capital loss carryforward - U.S.	117,924	103,850
Tax monetization transaction	(105,789)	(80,478)
Investment tax credits	1,341	1,341
Production tax credits	82,451	70,792
Stock options amortization	3,241	3,467
Basis difference in partnership interest	(24,462)	(16,801)
Accrued liabilities and other	(752)	2,435
	74,229	37,882
Less - valuation allowance	(109,611)	(70,536)	$ (111,280)	$ (114,806)
Total	$ (35,382)	$ (32,654)	$ (66,943)