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Note 8 - Components of Accumulated Other Comprehensive Loss (Tables) | 3 Months Ended
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Mar. 31, 2018
Notes Tables |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  | Net Unrealized Gain (Loss) on Securities |  |  | Adjustments Related to Pension Benefits |  |  | Accumulated Other Comprehensive Loss |
Balance at December 31, 201 6 |  | $ | (3,588 | ) |  | $ | (5,071 | ) |  | $ | (8,659 | )
Unrealized holding gain on available for sale securities, net of tax of $580 |  |  | 1,075 |  |  |  | --- |  |  |  | 1,075 |
Balance at March 31, 2017 |  | $ | (2,513 | ) |  | $ | (5,071 | ) |  | $ | (7,584 | )
Balance at December 31, 201 7 |  | $ | (3,704 | ) |  | $ | (5,991 | ) |  | $ | (9,695 | )
Unrealized holding gain on available for sale securities net of tax of ($706) |  |  | (2,655 | ) |  |  | --- |  |  |  | (2,655 | )
Balance at March 31, 2018 |  | $ | (6,359 | ) |  | $ | (5,991 | ) |  | $ | (12,350 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 + Details
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