Note 17 - Income Taxes - Components of Income Tax Provision (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal									$ 0	$ 0	$ 0
State									363	172	381
Foreign									61,574	16,969	14,992
Total current income tax expense									61,937	17,141	15,373
Deferred:
Federal									22,682	(12,179)	(6,886)
State									7,277	4,671	(2,595)
Foreign									(24,893)	35,980	28,841
Total deferred tax provision (benefit)									5,066	28,472	19,360
Total Income tax provision	$ 21,728	$ 15,361	$ 11,766	$ 18,148	$ 25,477	$ 9,626	$ (3,529)	$ 14,039	$ 67,003	$ 45,613	$ 34,733