Note 7 - Interest Expense, Net - Components of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Interest related to sale of tax benefits	$ 2,545	$ 2,500	$ 4,938	$ 4,824
Interest expense	19,646	19,634	39,320	36,800
Less — amount capitalized	(3,565)	(2,349)	(6,616)	(4,566)
Total interest expense, net	$ 18,626	$ 19,785	$ 37,642	$ 37,058