Note 7 - Interest Expense, Net (Details) - Components of Interest Expense - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Components of Interest Expense [Abstract]
Interest related to sale of tax benefits	$ 2,375	$ 3,430	$ 7,062	$ 9,678
Interest expense	16,510	19,910	50,430	57,139
Less — amount capitalized	(1,137)	(846)	(3,057)	(1,733)
	$ 17,748	$ 22,494	$ 54,435	$ 65,084