Note 17 - Interest Expense, Net - Components of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Interest related to sale of tax benefits									$ 11,786	$ 11,284	$ 6,985
Interest expense									71,883	63,368	54,381
Less — amount capitalized									(3,285)	(3,728)	(7,224)
	$ 17,568	$ 20,076	$ 21,517	$ 21,223	$ 22,034	$ 18,700	$ 15,846	$ 14,344	$ 80,384	$ 70,924	$ 54,142