Note 19 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Expense	$ 991	$ 849
Deferred tax benefit	(209)	(179)
Total net expense	782	670
Stock Appreciation Rights (SARs) [Member]
Expense	94	89
Deferred tax benefit	(20)	(19)
Total net expense	74	70
Restricted Stock [Member]
Expense	330	329
Deferred tax benefit	(70)	(69)
Total net expense	260	260
Restricted Stock Units (RSUs) [Member]
Expense	86	76
Deferred tax benefit	(18)	(16)
Total net expense	68	60
Performance Shares [Member]
Expense	481	355
Deferred tax benefit	(101)	(75)
Total net expense	$ 380	$ 280