Note 5 - Loans and the Allowance for Credit Losses - Loans Receivable on Nonaccrual Status (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Nonaccrual loans with ACL	$ 47,791	$ 45,347
Nonaccrual loans without ACL	9,656	16,353
Total Nonaccrual loans	57,447	61,700
Commercial Portfolio Segment [Member]
Nonaccrual loans with ACL	25,657	28,746
Nonaccrual loans without ACL	1,201	1,316
Total Nonaccrual loans	26,858	30,062
Commercial Real Estate Portfolio Segment [Member]
Nonaccrual loans with ACL	21,511	15,362
Nonaccrual loans without ACL	6,627	10,031
Total Nonaccrual loans	28,138	25,393
Residential Portfolio Segment [Member]
Nonaccrual loans with ACL	623	1,239
Nonaccrual loans without ACL	1,828	1,856
Total Nonaccrual loans	2,451	3,095
Commercial Construction Portfolio Segment [Member]
Nonaccrual loans with ACL		0
Nonaccrual loans without ACL		3,150
Total Nonaccrual loans	$ 0	$ 3,150