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Note 2 - Investment Securities - Available For Sale Securities in Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Securities Available for Sale, Less than 12 Months Fair Value | $ 33,801 | $ 37,086
Securities Available for Sale, Less than 12 Months Unrealized Losses | (566) | (693)
Securities Available for Sale, 12 Months or Longer Fair Value | 31,280 | 32,505
Securities Available for Sale, 12 Months or Longer Unrealized Losses | (2,179) | (2,523)
Securities Available for Sale, Total Fair Value | 65,081 | 69,591
Securities Available for Sale, Total Unrealized Losses | (2,745) | (3,216)
US States and Political Subdivisions Debt Securities [Member] |  |
Securities Available for Sale, Less than 12 Months Fair Value | 20,153 | 24,252
Securities Available for Sale, Less than 12 Months Unrealized Losses | (375) | (527)
Securities Available for Sale, 12 Months or Longer Fair Value | 721 | 715
Securities Available for Sale, 12 Months or Longer Unrealized Losses | (52) | (59)
Securities Available for Sale, Total Fair Value | 20,874 | 24,967
Securities Available for Sale, Total Unrealized Losses | (427) | (586)
Single Issue Trust Preferred Securities [Member] |  |
Securities Available for Sale, Less than 12 Months Fair Value |  |
Securities Available for Sale, Less than 12 Months Unrealized Losses |  |
Securities Available for Sale, 12 Months or Longer Fair Value | 20,276 | 19,939
Securities Available for Sale, 12 Months or Longer Unrealized Losses | (1,836) | (2,165)
Securities Available for Sale, Total Fair Value | 20,276 | 19,939
Securities Available for Sale, Total Unrealized Losses | (1,836) | (2,165)
Mortgage-backed Agency Securities [Member] |  |
Securities Available for Sale, Less than 12 Months Fair Value | 13,648 | 12,834
Securities Available for Sale, Less than 12 Months Unrealized Losses | (191) | (166)
Securities Available for Sale, 12 Months or Longer Fair Value | 10,283 | 11,851
Securities Available for Sale, 12 Months or Longer Unrealized Losses | (291) | (299)
Securities Available for Sale, Total Fair Value | 23,931 | 24,685
Securities Available for Sale, Total Unrealized Losses | $ (482) | $ (465)

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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 + Details
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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 + Details
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