Note 9 - Borrowed Funds - Comparative Data for Securities Sold Under Agreements to Repurchase (Details) - USD ($) $ in Thousands |
12 Months Ended | |||||||
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Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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Average amount outstanding during the year (1) | [1] | $ 136,849 | $ 381,967 | $ 400,822 | ||||
Maximum amount outstanding at month-end (2) | [2] | 150,000 | 400,000 | 400,000 | ||||
Balance, December 31 | $ 100,000 | $ 350,000 | $ 400,000 | |||||
Rate, December 31 | 2.86% | 4.06% | 3.89% | |||||
Weighted average interest rate for the year | 3.11% | 4.01% | 3.95% | |||||
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