Note 8 - Premises and Equipment, Net (Details) - Premises and Equipment Balances - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Premises and equipment	$ 49,181	$ 48,444
Accumulated depreciation	(27,519)	(26,438)
Premises and equipment, net	21,662	22,006
Land [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	5,521	5,521
Building [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	19,565	19,539
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	14,613	13,395
Software and Software Development Costs [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	5,598	5,556
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	3,790	3,782
Assets Held under Capital Leases [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment		557
Automobiles [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	$ 94	$ 94