Note 18 - Revenue from Contracts with Customers - Summary of Revenue (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues		$ 7,072	$ 8,092	$ 15,636	$ 15,204
Non-interest income, not in-scope(2)	[1]	8,534	4,702	5,756	10,511
Total non-interest income		15,606	12,794	21,392	25,715
Fees and Services Charges on Deposit Account [Member]
Revenues		1,873	2,020	3,928	4,047
Wealth Management Fees [Member]
Revenues		2,209	2,513	5,346	4,209
Other Service Fees [Member]
Revenues	[2]	$ 2,990	$ 3,559	$ 6,362	$ 6,948

[1] These amounts primarily represent revenue from contracts with customers that are out of the scope of ASC 606.

[2] Other service fees comprise of fees related to letters of credit, wire fees, fees on foreign exchange transactions and other immaterial individual revenue streams.