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Note 2 - Investment Securities (Details Textual) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) | Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) | Dec. 31, 2016 USD ($)
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | $ 0 |  | $ 0 |  | $ 2
Number of Securities in Unrealized Loss Position | 45 |  | 45 |  | 82
Percentage of Combined Depreciation of Combined Reported Value of Aggregate Securities Portfolio | 0.52% |  | 0.52% |  | 1.51%
Available-for-sale Securities Pledged as Collateral | $ 132,600 |  | $ 132,600 |  | $ 139,750
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net |  | $ 11 |  | $ 11 |
Debt Securities [Member] |  |  |  |  |
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net | 0 | 0 | 0 | 0 |
Equity Securities [Member] |  |  |  |  |
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net | $ 0 | $ 11 | $ 0 | $ 11 |

X
- Definition Represents the number of securities in unrealized loss position. + References No definition available. + Details
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- Definition Represents the percentage of combined depreciation of combined reported value of aggregate securities portfolio. + References No definition available. + Details
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- Definition The fair value of available-for-sale securities that serve as collateral for borrowings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5086-111524 + Details
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- Definition Amount of accumulated unrealized loss on investments in debt securities classified as held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 + Details
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- Definition The amount of other than temporary impairment (OTTI) losses on equity securities, OTTI related to credit losses on debt securities, and OTTI losses on debt securities when the entity intends to sell the securities or it is more likely than not that the entity will be required to sell the securities before recovery of its amortized cost basis. Additionally, this item includes OTTI losses recognized during the period on investments accounted for under the cost method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 8B -URI http://asc.fasb.org/extlink&oid=82897076&loc=SL6284393-111563 + Details
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