Note 17 - Income Taxes - Net Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets (liabilities):
Net foreign deferred taxes, primarily depreciation	$ (49,295)	$ (54,899)
Depreciation, deferred tax asset	50,214
Depreciation, deferred tax liability		(62,906)
Intangible drilling costs, liability	(13,855)	(11,501)
Net operating loss carryforward - U.S.	26,824	32,848
Tax monetization transaction	(84,585)	(62,533)
Right-of-use assets	(5,824)	(5,101)
Lease liabilities	5,527	5,148
Production tax credits	109,109	108,103
Foreign tax credits	32,333	92,240
Withholding tax	(21,007)	(20,521)
Basis difference in partnership interest	(51,392)	(45,683)
Excess business interest	522	13,662
Sale and leaseback transaction	62,939	64,070
Other assets	13,655	12,998
Accrued liabilities and other	5,208	4,161
Total	80,373	70,086
Less - valuation allowance	(2,473)	(11,298)	$ (22,193)
Total, net	$ 77,900	$ 58,788