Note 15 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Quantitative Information about Level 3 Assets - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014
Income Approach Valuation Technique [Member] | Corporate Debt Securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value (in Dollars)		$ 2,834	$ 3,005
Valuation technique		Discounted Cash Flows	Discounted Cash Flows
Unobservable input		Discount Rate	Discount Rate
Income Approach Valuation Technique [Member] | Collateralized Debt Obligations [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value (in Dollars)		$ 1,883	$ 3,193
Valuation technique		Discounted Cash Flows	Discounted Cash Flows
Unobservable input		Discount Rate	Discount Rate
Income Approach Valuation Technique [Member] | SBA Servicing Assets [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value (in Dollars)		$ 4,886	$ 4,099
Valuation technique		Discounted Cash Flows	Discounted Cash Flows
Unobservable input		Discount Rate	Discount Rate	[1]
Unobservable input		Conditional Prepayment Rate	Conditional Prepayment Rate
Market Approach Valuation Technique [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value (in Dollars)		$ 5,734	$ 15,838
Valuation technique	[2]	Appraised Valueof Collateral (1)	Appraised Value of Collateral (1)
Unobservable input	[3]	Liquidation expenses (2)	Liquidation expenses (2)
Market Approach Valuation Technique [Member] | Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value (in Dollars)		$ 10,034	$ 2,135
Valuation technique	[2]	Appraised Value of Collateral (1)	Appraised Value of Collateral (1)
Unobservable input	[3]	Liquidation expenses (2)	Liquidation expenses (2)
Unobservable input		Appraisal adjustment (2)	Appraisal adjustment (2)
Sales Price Valuation Technique [Member] | Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Valuation technique		Sales Price	Sales Price
Unobservable input		Liquidation expenses (2)	Liquidation expenses (2)
Minimum [Member] | Income Approach Valuation Technique [Member] | Collateralized Debt Obligations [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate	[1]	7.31%	4.34%
Discount rate, weighted average	[1]	(7.31%)	(4.34%)
Minimum [Member] | Market Approach Valuation Technique [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Liquidation expenses	[1]	12.00%	0.00%
Liquidation expenses, weighted average	[1]	(12.00%)	(0.00%)
Minimum [Member] | Market Approach Valuation Technique [Member] | Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Liquidation expenses	[1]	6.00%	4.00%
Liquidation expenses, weighted average	[1]	(6.00%)	(4.00%)
Appraisal adjustment			20.00%
Appraisal adjustment, weighted average			(20.00%)
Minimum [Member] | Sales Price Valuation Technique [Member] | Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Liquidation expenses		7.00%
Liquidation expenses, weighted average		(7.00%)
Weighted Average [Member] | Income Approach Valuation Technique [Member] | Corporate Debt Securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate	[1]	4.11%	3.48%
Discount rate, weighted average	[1]	(4.11%)	(3.48%)
Weighted Average [Member] | Income Approach Valuation Technique [Member] | Collateralized Debt Obligations [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate	[1]	7.77%	9.19%
Discount rate, weighted average	[1]	(7.77%)	(9.19%)
Weighted Average [Member] | Income Approach Valuation Technique [Member] | SBA Servicing Assets [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate		10.00%	12.48%	[1]
Discount rate, weighted average		(10.00%)	(12.48%)	[1]
December 31, 2014:
Conditional prepayment rate, weighted average		(6.27%)	(7.45%)
Weighted Average [Member] | Market Approach Valuation Technique [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Liquidation expenses	[1]	20.00%	24.00%
Liquidation expenses, weighted average	[1]	(20.00%)	(24.00%)
Weighted Average [Member] | Market Approach Valuation Technique [Member] | Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Liquidation expenses	[1]	10.00%	16.00%
Liquidation expenses, weighted average	[1]	(10.00%)	(16.00%)
Appraisal adjustment		50.00%	32.00%
Appraisal adjustment, weighted average		(50.00%)	(32.00%)
Weighted Average [Member] | Sales Price Valuation Technique [Member] | Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Liquidation expenses		9.00%	12.00%
Liquidation expenses, weighted average		(9.00%)	(12.00%)
Maximum [Member] | Income Approach Valuation Technique [Member] | Collateralized Debt Obligations [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate	[1]	7.81%	9.25%
Discount rate, weighted average	[1]	(7.81%)	(9.25%)
Maximum [Member] | Market Approach Valuation Technique [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Liquidation expenses	[1]	78.00%	78.00%
Liquidation expenses, weighted average	[1]	(78.00%)	(78.00%)
Maximum [Member] | Market Approach Valuation Technique [Member] | Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Liquidation expenses	[1]	30.00%	31.00%
Liquidation expenses, weighted average	[1]	(30.00%)	(31.00%)
Appraisal adjustment			40.00%
Appraisal adjustment, weighted average			(40.00%)
Maximum [Member] | Sales Price Valuation Technique [Member] | Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Liquidation expenses		9.00%
Liquidation expenses, weighted average		(9.00%)

[1] The range and weighted average of qualitative factors such as economic conditions and estimated liquidation expenses are presented as a percent of theappraised value.

[2] Fair value is generally determined through independent appraisals of the underlying collateral, which include Level 3 inputs that are not identifiable.

[3] Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses.