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Note 22 - Derivatives (Details Textual)
$ in Thousands
1 Months Ended 12 Months Ended
Mar. 14, 2016
USD ($)
Mar. 31, 2016
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Gain (Loss) on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring, Net     $ (2,325)
Obligation to Return Securities Received as Collateral       $ 2,400  
Number of Mortgage Backed Securities Pledged       3  
Pledge on One Mortgage Backed Securities       $ 3,800  
Fair Value, Estimate Not Practicable, Mortgage-backed Securities Held-to-maturity       4,000  
Interest Rate Swap [Member]          
Derivative Asset, Fair Value, Amount Not Offset Against Collateral     $ 0 $ 0  
Federal Home Loan Bank of San Francisco [Member]          
Repayments of Federal Home Loan Bank Borrowings $ 75,000        
Gain (Loss) on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring, Net   $ (2,300)      
Federal Home Loan Bank of San Francisco [Member] | Designated as Hedging Instrument [Member]          
Repayments of Federal Home Loan Bank Borrowings   $ 75,000