Note 17 - Revenue from Contracts with Customers - Summary of Revenue (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Fees and service charges on deposit accounts	[1]	$ 6,867	$ 6,660
Noninterest income, not in-scope(3)	[2]	(1,557)	58
Total non-interest income		5,310	6,718
Fees and Services Charges on Deposit Account [Member]
Fees and service charges on deposit accounts	[1]	2,318	2,512
Wealth Management Fees [Member]
Fees and service charges on deposit accounts	[1]	1,301	979
Other Service Fees [Member]
Fees and service charges on deposit accounts	[1],[3]	$ 3,248	$ 3,169

[1] 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.

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

[3] Other service fees comprise of immaterial individual revenue streams.