Note 14 - Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2023	Mar. 31, 2023
Balance	$ 1,776,261	$ 1,668,602
Balance	1,839,089	1,776,261
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Balance	(5,514)	(7,727)
Other comprehensive income before reclassifications	886	2,524
Tax effect	(158)	(311)
Net current period other comprehensive income	728	2,213
Balance	(4,786)	(5,514)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	(12,431)	(15,350)
Other comprehensive income before reclassifications	(26,180)	2,919
Tax effect	0	0
Net current period other comprehensive income	(26,180)	2,919
Balance	(38,611)	(12,431)
AOCI Attributable to Parent [Member]
Balance	(17,945)	(23,077)
Other comprehensive income before reclassifications	(25,294)	5,443
Tax effect	(158)	(311)
Net current period other comprehensive income	(25,452)	5,132
Balance	$ (43,397)	$ (17,945)