Note 18 - Revenue from Contracts with Customers - Summary of Revenue (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue		$ 8,092	$ 7,015	$ 15,204	$ 13,882
Noninterest income, not in-scope(2)	[1]	4,702	752	10,511	(805)
Total non-interest income		12,794	7,767	25,715	13,077
Fees and Services Charges on Deposit Account [Member]
Revenue		2,020	2,076	4,047	4,394
Wealth Management Fees [Member]
Revenue		2,513	1,423	4,209	2,724
Other Service Fees [Member]
Revenue	[2]	$ 3,559	$ 3,516	$ 6,948	$ 6,764

[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.