Note 8 - Business Segments - Reconciling Information Between Reportable Segments and Consolidated Totals (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenue	$ 185,232	$ 183,710
Operating income (loss)	53,166	45,078
Interest income	1,851	342
Interest expense, net	(23,631)	(21,081)
Derivatives and foreign currency transaction gains (losses)	(1,937)	260
Income attributable to sale of tax benefits	12,566	7,705
Other non-operating income, net	60	75
Total consolidated income before income taxes and equity in income of investees	42,075	32,379
Intersegment Eliminations [Member]
Revenue	7,772	20,903
Consolidation, Eliminations [Member]
Revenue	$ (7,772)	$ (20,903)