Note 5 - Premises and Equipment, Net (Details) - Summary of Premises and Equipment (USD $)	Jun. 30, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Premises and equipment	$ 70,870,000	$ 46,007,000
Less: accumulated depreciation	21,867,000	21,109,000
Premises and equipment, net	49,003,000	24,898,000
Land, Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	55,352,000	33,289,000
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	$ 15,518,000	$ 12,718,000