Note 13 - Leases - Operating Lease Related Assets and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Right-of-use assets- operating leases	$ 27,834	$ 30,919
Lease liabilities - operating leases	$ 30,694	$ 33,484
Weighted-average remaining lease term (in years) (Year)	4 years 4 months 24 days	4 years 8 months 12 days
Weighted-average discount rate	2.61%	2.77%
Operating cash flows from operating leases	$ 9,900	$ 9,300
ROU assets obtained in exchange for lease obligations	$ 6,000	$ 5,700