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Note 10 - Fair Value of Financial Instruments - Financial Assets and Liabilities Reported Under the Fair Value Option (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Financial Assets at Fair Value Option |  | $ 14,000 |  | $ 14,000 |  | $ 14,300
Net loss from fair value adjustments |  | (267) | $ (1,159) | (367) | $ (1,537) |
Collateralized Mortgage Backed Securities [Member] |  |  |  |  |  |
Financial Assets at Fair Value Option |  | 1,426 |  | 1,426 |  | 1,590
Net loss from fair value adjustments |  |  | (3) | (11) | (10) |
Other Securities [Member] |  |  |  |  |  |
Financial Assets at Fair Value Option |  | 12,615 |  | 12,615 |  | 12,685
Net loss from fair value adjustments |  | (62) | 112 | (200) | 144 |
Junior Subordinated Debentures [Member] |  |  |  |  |  |
Financial Assets at Fair Value Option |  | 39,566 |  | 39,566 |  | $ 36,986
Net loss from fair value adjustments |  | (867) | (595) | (2,548) | (1,165) |
Financial Assets and Liabilities, Excluding Interest Rate Caps / Swaps [Member] |  |  |  |  |  |
Net loss from fair value adjustments | [1] | $ (929) | $ (486) | $ (2,759) | $ (1,031) |
[1] | The net loss from fair value adjustments presented in the above table does not include net gains of $1.7 million and $0.2 million for the three months ended March 31, 2018 and 2017, respectively, from the change in the fair value of interest rate swaps.

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- Definition The fair value option of financial assets. + References No definition available. + Details
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- Definition For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612 + Details
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