Note 14 - Leases (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Operating Lease, Expense	$ 1,300,000	$ 1,300,000	$ 2,600,000	$ 2,600,000
Operating Lease, Lease Income, Total	135,000	$ 98,000	270,000	$ 203,000
Operating Lease, Right-of-Use Asset	25,931,000		25,931,000		$ 22,454,000
Operating Lease, Liability, Total	$ 26,823,000		$ 26,823,000		$ 23,282,000
New York Branch [Member]
Lessee, Operating Lease, Renewal Term (Year)	10 years		10 years
Operating Lease, Right-of-Use Asset	$ 4,800,000		$ 4,800,000
Operating Lease, Liability, Total	$ 4,800,000		$ 4,800,000