Note 8 - Business Segments - Reconciling Information Between Reportable Segments and Consolidated Totals (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenue	$ 194,796	$ 169,078	$ 380,028	$ 352,788
Operating income (loss)	24,224	38,607	77,390	83,685
Interest income	4,942	179	6,793	521
Interest expense, net	(24,393)	(20,418)	(48,024)	(41,499)
Derivatives and foreign currency transaction gains (losses)	(1,272)	(3,998)	(3,209)	(3,738)
Income attributable to sale of tax benefits	14,979	9,527	27,545	17,232
Other non-operating income (expense), net	79	(1,260)	139	(1,185)
Total consolidated income before income taxes and equity in income of investees	18,559	22,637	60,634	55,016
Intersegment Eliminations [Member]
Revenue	12,918	22,097	20,690	43,000
Consolidation, Eliminations [Member]
Revenue	$ (12,918)	$ (22,097)	$ (20,690)	$ (43,000)