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Note 16 - Employee Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Schedule of Net Benefit Costs [Table Text Block] |
|  | Year ended December 31, |
|  | 2017 |  |  | 2016 |
Service cost |  | $ | 6 |  |  | $ | 6 |
Interest cost on projected benefit obligation |  |  | 1,518 |  |  |  | 1,675 |
Net amortization of actuarial loss |  |  | 693 |  |  |  | 664 |
Expected return on plan assets |  |  | (1,813 | ) |  |  | (1,971 | )
Net periodic benefit cost |  | $ | 404 |  |  | $ | 374 |
Schedule of Changes in Projected Benefit Obligations [Table Text Block] |
|  | December 31, |
|  | 2017 |  |  | 2016 |
Change in benefit obligation: |  |  |  |  |  |  |  |
Benefit obligation at beginning of year |  | $ | 39,312 |  |  | $ | 40,958 |
Service cost |  |  | 6 |  |  |  | 6 |
Interest cost |  |  | 1,518 |  |  |  | 1,675 |
Actuarial loss (gain) |  |  | 1,278 |  |  |  | (325 | )
Benefits paid |  |  | (2,935 | ) |  |  | (3,002 | )
Benefit obligation at end of year |  | $ | 39,179 |  |  | $ | 39,312 |
|  | December 31, |
|  | 2017 |  |  | 2016 |
Change in plan assets: |  |  |  |  |  |  |  |
Fair value of plan assets at beginning of year |  | $ | 33,838 |  |  | $ | 35,126 |
Actual return on plan assets |  |  | 3,495 |  |  |  | 1,714 |
Company contributions |  |  | 0 |  |  |  | 0 |
Benefits paid |  |  | (2,935 | ) |  |  | (3,002 | )
Fair value of plan assets at end of year |  | $ | 34,398 |  |  | $ | 33,838 |
Underfunded status of the plans |  | $ | (4,781 | ) |  | $ | (5,474 | )
Balance sheet assets (liabilities): |  |  |  |  |  |  |  |
Other liabilities |  | $ | (4,781 | ) |  | $ | (5,474 | )
Net amount recognized |  | $ | (4,781 | ) |  | $ | (5,474 | )
Pension plans with accumulated benefit obligation in excess of plan assets: |  |  |  |  |  |  |  |
Projected benefit obligation |  | $ | 26,327 |  |  | $ | 39,312 |
Accumulated benefit obligation |  |  | 26,327 |  |  |  | 39,309 |
Fair value of plan assets |  |  | 21,539 |  |  |  | 33,838 |
Projected benefit obligation and net periodic pension cost assumptions: |  |  |  |  |  |  |  |
Discount rate – projected benefit obligation |  |  | 3.55 | % |  |  | 4.05 | %
Discount rate – net periodic pension cost |  |  | 4.05 |  |  |  | 4.35 |
Rate of compensation increase |  |  | 4.00 |  |  |  | 4.00 |
Expected long-term rate of return on plan assets |  |  | 5.15 | – | 6.30 |  |  |  | 5.40 | – | 6.75 |
Weighted average asset allocation: |  |  |  |  |  |  |  |
Equity securities |  |  | 27 | % |  |  | 25 | %
Debt securities |  |  | 71 |  |  |  | 73 |
Other |  |  | 2 |  |  |  | 2 |
Total |  |  | 100 | % |  |  | 100 | %
Schedule of Allocation of Plan Assets [Table Text Block] |
|  |  |  |  |  | Significant |
|  | Quoted Prices |  |  | Other |
|  | In Active |  |  | Observable |
|  | Markets |  |  | Inputs |
|  | (Level 1) |  |  | (Level 2) |
Asset categories: |  |  |  |  |  |  |  |
Cash and cash equivalents |  | $ | 1,090 |  |  | $ | 0 |
Equity securities: |  |  |  |  |  |  |  |
U.S. Large Cap |  |  | 5,845 |  |  |  | 0 |
U.S. Mid Cap |  |  | 1,343 |  |  |  | 0 |
U.S. Small Cap |  |  | 795 |  |  |  | 0 |
World Equity |  |  | 1,484 |  |  |  | 0 |
Real Estate |  |  | 473 |  |  |  | 0 |
Other |  |  | 147 |  |  |  | 0 |
Fixed income securities |  |  | 6,462 |  |  |  | 16,759 |
Total Plan Assets |  | $ | 17,639 |  |  | $ | 16,759 |
|  |  |  |  |  | Significant |
|  | Quoted Prices |  |  | Other |
|  | In Active |  |  | Observable |
|  | Markets |  |  | Inputs |
|  | (Level 1) |  |  | (Level 2) |
Asset categories: |  |  |  |  |  |  |  |
Cash and cash equivalents |  | $ | 1,253 |  |  | $ | 0 |
Equity securities: |  |  |  |  |  |  |  |
U.S. Large Cap |  |  | 6,105 |  |  |  | 0 |
U.S. Mid Cap |  |  | 891 |  |  |  | 0 |
U.S. Small Cap |  |  | 443 |  |  |  | 0 |
World Equity |  |  | 1,095 |  |  |  | 0 |
Real Estate |  |  | 314 |  |  |  | 0 |
Other |  |  | 223 |  |  |  | 0 |
Fixed income securities |  |  | 8,525 |  |  |  | 14,989 |
Total Plan Assets |  | $ | 18,849 |  |  | $ | 14,989 |
Schedule of Expected Benefit Payments [Table Text Block] |
2018 |  |  | 2,998 |
2019 |  |  | 2,942 |
2020 |  |  | 2,873 |
2021 |  |  | 2,829 |
2022 |  |  | 2,768 |
2023 | - | 2027 |  |  | 12,719 |
Total |  | $ | 27,129 |

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- Definition Tabular disclosure of the major categories of plan assets of pension plans and/or other employee benefit plans. This information may include, but is not limited to, the target allocation of plan assets, the fair value of each major category of plan assets, and the level within the fair value hierarchy in which the fair value measurements fall. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(5) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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