Note 17 - Fair Value of Financial Instruments - Summary of Assets and Liabilities Measured at Fair Value Using Significant Unobservable Inputs (Level 3) (Details) - Fair Value, Inputs, Level 3 [Member] $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($)
Impaired Loans [Member] | Minimum [Member]
Quantitative range of unobservable inputs	9.00%
Impaired Loans [Member] | Maximum [Member]
Quantitative range of unobservable inputs	10.00%
Impaired Loans [Member] | Weighted Average [Member]
Quantitative range of unobservable inputs	9.50%
Impaired Loans [Member]
Fair value	$ 1,690
OREO [Member] | Minimum [Member]
Quantitative range of unobservable inputs	9.00%
OREO [Member] | Maximum [Member]
Quantitative range of unobservable inputs	10.00%
OREO [Member] | Weighted Average [Member]
Quantitative range of unobservable inputs	9.50%
OREO [Member]
Fair value	$ 5,391
Minimum [Member] | Other Assets [Member]
Quantitative range of unobservable inputs	9.00%
Maximum [Member] | Other Assets [Member]
Quantitative range of unobservable inputs	10.00%
Weighted Average [Member] | Other Assets [Member]
Quantitative range of unobservable inputs	9.50%
Other Assets [Member]
Fair value	$ 73