Note 17 - Revenue from Contracts with Customers - Summary of Revenue (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Fees and service charges on deposit accounts		$ 7,015	$ 5,999	$ 13,882	$ 12,659
Noninterest income, not in-scope(3)	[1]	752	153	(805)	211
Total non-interest income	[2]	7,767	6,152	13,077	12,870
Fees and Services Charges on Deposit Account [Member]
Fees and service charges on deposit accounts	[2]	2,076	2,245	4,394	4,757
Wealth Management Fees [Member]
Fees and service charges on deposit accounts	[2]	1,423	574	2,724	1,553
Other Service Fees [Member]
Fees and service charges on deposit accounts	[2],[3]	$ 3,516	$ 3,180	$ 6,764	$ 6,349

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

[2] There were no adjustments to the Company's financial statements recorded as a result of the adoption of ASC 606. For comparability, the Company has adjusted prior period amounts to conform to the periods presentation.

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