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Note 15 - Accumulated Other Comprehensive Loss (Tables) | 12 Months Ended
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Dec. 31, 2018
Notes Tables |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  | Unrealized Gains (Losses) On Securities |  |  | Changes in fair value of derivative contracts designated as hedge transactions |  |  | Adjustments For Pension Plans |  |  | Total Accumulated Other Comprehensive Loss, Net |
Balance January 1, 2016 |  | $ | (1,159 | ) |  | $ | — |  |  | $ | (31,472 | ) |  | $ | (32,631 | )
2016 change |  |  | 2,613 |  |  |  | (5,260 | ) |  |  | 676 |  |  |  | (1,971 | )
Balance December 31, 2016 |  |  | 1,454 |  |  |  | (5,260 | ) |  |  | (30,796 | ) |  |  | (34,602 | )
2017 change |  |  | 2,265 |  |  |  | 10,290 |  |  |  | (1,326 | ) |  |  | 11,229 |
Balance December 31, 2017 |  |  | 3,719 |  |  |  | 5,030 |  |  |  | (32,122 | ) |  |  | (23,373 | )
Change in accounting |  |  | (1,289 | ) |  |  | — |  |  |  | — |  |  |  | (1,289 | )
2018 change |  |  | (2,443 | ) |  |  | (13,814 | ) |  |  | (1,550 | ) |  |  | (17,807 | )
Balance December 31, 2018 |  | $ | (13 | ) |  | $ | (8,784 | ) |  | $ | (33,672 | ) |  | $ | (42,469 | )
|  | Income Tax Effect of: |
|  | Unrealized Gains (Losses) On Securities |  |  | Changes in fair value of derivative contracts designated as hedge transactions |  |  | Adjustments For Pension Plans |  |  | Total Accumulated Other Comprehensive Loss, Net |
Balance January 1, 2016 |  | $ | 631 |  |  | $ | — |  |  | $ | 10,630 |  |  | $ | 11,261 |
2016 change |  |  | (4 | ) |  |  | — |  |  |  | (510 | ) |  |  | (514 | )
Balance December 31, 2016 |  |  | 627 |  |  |  | — |  |  |  | 10,120 |  |  |  | 10,747 |
2017 change |  |  | 1,164 |  |  |  | — |  |  |  | — |  |  |  | 1,164 |
Balance December 31, 2017 |  |  | 1,791 |  |  |  | — |  |  |  | 10,120 |  |  |  | 11,911 |
2018 change |  |  | (1,791 | ) |  |  | — |  |  |  | 2,455 |  |  |  | 664 |
Balance December 31, 2018 |  | $ | — |  |  | $ | — |  |  | $ | 12,575 |  |  | $ | 12,575 |

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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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