Note 17 - Revenue from Contracts with Customers - Summary of Revenue (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Fees and service charges on deposit accounts		$ 6,931	$ 6,502	$ 20,813	$ 19,161
Noninterest income, not in-scope(3)	[1]	904	6,459	99	6,670
Total non-interest income	[2]	7,835	12,961	20,912	25,831
Fees and Services Charges on Deposit Account [Member]
Fees and service charges on deposit accounts	[2]	2,027	2,286	6,421	7,043
Wealth Management Fees [Member]
Fees and service charges on deposit accounts	[2]	1,528	353	4,252	1,906
Other Service Fees [Member]
Fees and service charges on deposit accounts	[2],[3]	$ 3,376	$ 3,863	$ 10,140	$ 10,212

[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.