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Note 14 - Benefit Plans - Weighted-average Asset Allocation (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Asset Category, Target | 100.00% |  |
Fair values of the Pension Plan's assets | $ 46,488 | $ 43,985 | $ 45,452
Asset Category, Percentage | 100.00% | 100.00% |
Fixed Income Funds [Member] |  |  |
Asset Category, Target | 20.00% |  |
Fair values of the Pension Plan's assets | $ 7,812 | $ 8,571 |
Asset Category, Percentage | 17.00% | 19.00% |
Domestic Equity [Member] |  |  |
Asset Category, Target | 49.00% |  |
Fair values of the Pension Plan's assets | $ 19,615 | $ 20,479 |
Asset Category, Percentage | 42.00% | 47.00% |
International Equity [Member] |  |  |
Asset Category, Target | 21.00% |  |
Fair values of the Pension Plan's assets | $ 13,466 | $ 9,687 |
Asset Category, Percentage | 29.00% | 22.00% |
Real Estate [Member] |  |  |
Asset Category, Target | 10.00% |  |
Fair values of the Pension Plan's assets | $ 5,595 | $ 5,248 |
Asset Category, Percentage | 12.00% | 12.00% |

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- Definition Fair value of assets that have been segregated and restricted to provide pension or postretirement benefits. Assets include, but are not limited to, stocks, bonds, other investments, earnings from investments, and contributions by the employer and employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=64937038&loc=d3e12355-114930 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Plan Assets -URI http://asc.fasb.org/extlink&oid=6749337 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Plan Assets -URI http://asc.fasb.org/extlink&oid=6520858 + Details
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- Definition Target allocation of investments of this type to total plan assets presented on a weighted average basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c)(i) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2446-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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