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Note 9 - Borrowed Funds and Securities Sold Under Agreements to Repurchase (Details) - Information Relating to All Repurchase Agreements Which Are Collateralized by Mortgage-Backed Securities - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Information Relating to All Repurchase Agreements Which Are Collateralized by Mortgage-Backed Securities [Abstract]      
Book value of collateral $ 131,421 $ 142,925 $ 199,447
Estimated fair value of collateral 131,421 142,925 199,447
Average balance of outstanding agreements during the year 116,000 137,824 172,944
Maximum balance of outstanding agreements at a month end during the year $ 116,000 $ 155,300 $ 185,300
Average interest rate of outstanding agreements during the year (1) [1] 3.22% 5.37% 3.42%
[1] During the year ended December 31, 2014, the Company prepaid $30.0 million in FHLB-NY repurchase agreements at an average cost of 4.98% while incurring a prepayment penalty totaling $2.7 million. Excluding the prepayment penalty, the average interest rate of agreements during the year ended December 31, 2014 was 3.40%.