Note 7 - Interest Expense, Net - Components of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Interest related to sale of tax benefits	$ 2,671	$ 2,916	$ 9,487	$ 6,086
Interest expense	17,924	16,571	54,307	45,298
Less — amount capitalized	(519)	(787)	(978)	(2,494)
	$ 20,076	$ 18,700	$ 62,816	$ 48,890