Note 15 - Concentrations of Credit Risk (Details) (Credit Concentration Risk [Member], USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Commercial Real Estate [Member]
Note 15 - Concentrations of Credit Risk (Details) [Line Items]
Concentration Risk, Percentage	52.00%	52.00%
Concentration Risk, Credit Risk, Financial Instrument, Maximum Exposure	$ 310,762	$ 311,266,000
College Housing and Professional Office Buildings [Member]
Note 15 - Concentrations of Credit Risk (Details) [Line Items]
Concentration Risk, Percentage	31.00%	32.00%
Concentration Risk, Credit Risk, Financial Instrument, Maximum Exposure	190,055,000	190,866,000
Residential [Member]
Note 15 - Concentrations of Credit Risk (Details) [Line Items]
Concentration Risk, Percentage	24.00%	24.00%
Concentration Risk, Credit Risk, Financial Instrument, Maximum Exposure	147,039,000	145,499,000
Automobile [Member]
Note 15 - Concentrations of Credit Risk (Details) [Line Items]
Concentration Risk, Percentage	2.00%	2.00%
Concentration Risk, Credit Risk, Financial Instrument, Maximum Exposure	$ 11,554	$ 11,580,000