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Note 8 - Repurchase Agreements (Tables)
9 Months Ended
Sep. 30, 2016
Notes Tables  
Schedule of Repurchase Agreements [Table Text Block]
    At September 30, 2016
    Remaining Contractual Maturity of Agreements
    Less than 1 year   1 year to 3 years   Over 3 years   Total
    (In thousands)
Repurchase agreements:                                
Mortgage-backed securities   $ -     $ -     $ 40,000     $ 40,000  
                                 
Total repurchase agreements   $ -     $ -     $ 40,000     $ 40,000  
    At December 31, 2015
    Remaining Contractual Maturity of Agreements
    Less than 1 year   1 year to 3 years   Over 3 years   Total
    (In thousands)
Repurchase agreements:                                
Mortgage-backed securities   $ 38,000     $ 38,000     $ 40,000     $ 116,000  
                                 
Total repurchase agreements   $ 38,000     $ 38,000     $ 40,000     $ 116,000