Note 7 - Premises and Equipment (Details) - Premises and Equipment - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Premises and equipment	$ 60,016	$ 47,624
Less accumulated depreciation	(13,852)	(12,594)
Net premises and equipment	46,164	35,030
Land [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	8,029	4,216
Building [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	16,215	9,375
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	19,621	19,592
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	11,680	10,035
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	$ 4,471	$ 4,406