Note 4 - Loans and the Allowance for Credit Losses - Loans Receivable on Nonaccrual Status (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Nonaccrual loans with ACL	$ 34,336	$ 45,347
Nonaccrual loans without ACL	10,118	16,353
Total Nonaccrual loans	44,454	61,700
Commercial Portfolio Segment [Member]
Nonaccrual loans with ACL	23,512	28,746
Nonaccrual loans without ACL	1,745	1,316
Total Nonaccrual loans	25,257	30,062
Commercial Real Estate Portfolio Segment [Member]
Nonaccrual loans with ACL	10,220	15,362
Nonaccrual loans without ACL	6,597	10,031
Total Nonaccrual loans	16,817	25,393
Residential Portfolio Segment [Member]
Nonaccrual loans with ACL	604	1,239
Nonaccrual loans without ACL	1,776	1,856
Total Nonaccrual loans	2,380	3,095
Commercial Construction Portfolio Segment [Member]
Nonaccrual loans with ACL		0
Nonaccrual loans without ACL		3,150
Total Nonaccrual loans	$ 0	$ 3,150