Note 5 - Loans and the Allowance for Credit Losses - Loans Receivable on Nonaccrual Status (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Nonaccrual loans with ACL	$ 22,929	$ 34,336
Nonaccrual loans without ACL	24,738	10,118
Total Nonaccrual loans	47,667	44,454
Commercial Portfolio Segment [Member]
Nonaccrual loans with ACL	18,766	23,512
Nonaccrual loans without ACL	555	1,745
Total Nonaccrual loans	19,321	25,257
Commercial Real Estate Portfolio Segment [Member]
Nonaccrual loans with ACL	3,348	10,220
Nonaccrual loans without ACL	22,138	6,597
Total Nonaccrual loans	25,486	16,817
Residential Portfolio Segment [Member]
Nonaccrual loans with ACL	815	604
Nonaccrual loans without ACL	2,045	1,776
Total Nonaccrual loans	$ 2,860	$ 2,380