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Note 8 - Employee Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract] |
Schedule of Defined Benefit Plans Disclosures [Table Text Block] |
|  | December 31, |
|  | 2014 |  |  | 2013 |  |  | 2012 |
Change in benefit obligation |  |  |  |  |  |  |  |  |  |  |  |
Projected benefit obligation at beginning of year |  | $ | 17,185 |  |  | $ | 18,054 |  |  | $ | 15,808 |
Service cost |  |  | 524 |  |  |  | 596 |  |  |  | 468 |
Interest cost |  |  | 663 |  |  |  | 617 |  |  |  | 738 |
Actuarial (gain) loss |  |  | 1,674 |  |  |  | (1,149 | ) |  |  | 1,554 |
Benefits paid |  |  | (722 | ) |  |  | (933 | ) |  |  | (514 | )
Projected benefit obligation at end of year |  | $ | 19,324 |  |  | $ | 17,185 |  |  | $ | 18,054 |
Change in plan assets |  |  |  |  |  |  |  |  |  |  |  |
Fair value of plan assets at beginning of year |  | $ | 16,605 |  |  | $ | 14,325 |  |  | $ | 13,326 |
Actual return on plan assets |  |  | 884 |  |  |  | 2,225 |  |  |  | 963 |
Employer contribution |  |  | 363 |  |  |  | 988 |  |  |  | 550 |
Benefits paid |  |  | (722 | ) |  |  | (933 | ) |  |  | (514 | )
Fair value of plan assets at end of year |  | $ | 17,130 |  |  | $ | 16,605 |  |  | $ | 14,325 |
Funded status at the end of the year |  | $ | (2,194 | ) |  | $ | (580 | ) |  | $ | (3,729 | )
Amounts recognized in the Consolidated Balance Sheet |  |  |  |  |  |  |  |  |  |  |  |
Deferred tax asset |  | $ | 768 |  |  | $ | 203 |  |  | $ | 1,305 |
Other liabilities |  |  | (2,194 | ) |  |  | (580 | ) |  |  | (3,729 | )
Total amounts recognized in the Consolidated Balance Sheet |  | $ | (1,426 | ) |  | $ | (377 | ) |  | $ | (2,424 | )
Amounts recognized in acc umulated other comprehensive (loss), net |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  | $ | (6,922 | ) |  | $ | (5,282 | ) |  | $ | (8,202 | )
Prior service cost |  |  | 669 |  |  |  | 779 |  |  |  | 879 |
Deferred tax asset |  |  | 2,163 |  |  |  | 1,550 |  |  |  | 2,538 |
Amount recognized |  | $ | (4,090 | ) |  | $ | (2,953 | ) |  | $ | (4,785 | )
Accrued/Prepaid benefit cost, net |  |  |  |  |  |  |  |  |  |  |  |
Benefit obligation |  | $ | (19,324 | ) |  | $ | (17,185 | ) |  | $ | (18,054 | )
Fair value of assets |  |  | 17,130 |  |  |  | 16,605 |  |  |  | 14,325 |
Unrecognized net actuarial loss |  |  | 6,922 |  |  |  | 5,282 |  |  |  | 8,202 |
Unrecognized prior service cost |  |  | (669 | ) |  |  | (779 | ) |  |  | (879 | )
Deferred tax liability |  |  | (1,395 | ) |  |  | (1,347 | ) |  |  | (1,233 | )
Prepaid benefit cost included in other liabilities |  | $ | 2,664 |  |  | $ | 2,576 |  |  | $ | 2,361 |
Components of net periodic benefit cost |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 524 |  |  | $ | 596 |  |  | $ | 468 |
Interest cost |  |  | 663 |  |  |  | 617 |  |  |  | 738 |
Expected return on plan assets |  |  | (1,112 | ) |  |  | (984 | ) |  |  | (1,075 | )
Amortization of prior service cost |  |  | (110 | ) |  |  | (101 | ) |  |  | (101 | )
Recognized net actuarial loss |  |  | 262 |  |  |  | 532 |  |  |  | 508 |
Net periodic benefit cost |  | $ | 227 |  |  | $ | 660 |  |  | $ | 538 |
Other changes in plan assets and benefit obligations recognized in other comprehensive loss |  |  |  |  |  |  |  |  |  |  |  |
Net (gain) loss |  | $ | 1,640 |  |  | $ | (2,921 | ) |  | $ | 1,157 |
Amortization of prior service cost |  |  | 110 |  |  |  | 101 |  |  |  | 101 |
Deferred income tax expense (benefit) |  |  | (612 | ) |  |  | 987 |  |  |  | (440 | )
Total recognized |  | $ | 1,138 |  |  | $ | (1,833 | ) |  | $ | 818 |
Total recognized in net periodic benefit cost and other comprehensive loss |  | $ | 1,977 |  |  | $ | (2,160 | ) |  | $ | 1,796 |
Weighted average assumptions at end of the year |  |  |  |  |  |  |  |  |  |  |  |
Discount rate used for net periodic pension cost |  |  | 4.50 | % |  |  | 3.75 | % |  |  | 4.50 | %
Discount rate used for disclosure |  |  | 3.75 | % |  |  | 4.50 | % |  |  | 3.75 | %
Expected return on plan assets |  |  | 7.50 | % |  |  | 7.50 | % |  |  | 8.00 | %
Rate of compensation increase |  |  | 3.00 | % |  |  | 3.00 | % |  |  | 3.00 | %
Schedule of Allocation of Plan Assets [Table Text Block] |
|  | Fair Value Measurements at December 31, 20 14 |
Asset Category |  | Total |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
Cash |  | $ | 737 |  |  | $ | 737 |  |  | $ | --- |  |  | $ | --- |
Equity securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U. S. companies |  |  | 8,729 |  |  |  | 8,729 |  |  |  | --- |  |  |  | --- |
International companies |  |  | 274 |  |  |  | 274 |  |  |  | --- |  |  |  | --- |
Equities mutual funds (1) |  |  | 1,861 |  |  |  | 1,861 |  |  |  | --- |  |  |  | --- |
U. S. government agencies and corporations |  |  | 107 |  |  |  | --- |  |  |  | 107 |  |  |  | --- |
State and political subdivisions |  |  | 365 |  |  |  | --- |  |  |  | 365 |  |  |  | --- |
Corporate bonds – investment grade (2) |  |  | 5,057 |  |  |  | --- |  |  |  | 5,057 |  |  |  | --- |
Total pension plan assets |  | $ | 17,130 |  |  | $ | 11,601 |  |  | $ | 5,529 |  |  | $ | --- |
|  | Fair Value Measurements at December 31, 20 13 |
Asset Category |  | Total |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
Cash |  | $ | 1,319 |  |  | $ | 1,319 |  |  | $ | --- |  |  | $ | --- |
Equity securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U. S. companies |  |  | 8,091 |  |  |  | 8,091 |  |  |  | --- |  |  |  | --- |
International companies |  |  | 137 |  |  |  | 137 |  |  |  | --- |  |  |  | --- |
Equities mutual funds (1) |  |  | 2,490 |  |  |  | 2,490 |  |  |  | --- |  |  |  | --- |
U. S. government agencies and corporations |  |  | 358 |  |  |  | --- |  |  |  | 358 |  |  |  | --- |
State and political subdivisions |  |  | 398 |  |  |  | --- |  |  |  | 398 |  |  |  | --- |
Corporate bonds – investment grade (2) |  |  | 3,812 |  |  |  | --- |  |  |  | 3,812 |  |  |  | --- |
Total pension plan assets |  | $ | 16,605 |  |  | $ | 12,037 |  |  | $ | 4,568 |  |  | $ | --- |
Schedule of Expected Benefit Payments [Table Text Block] |
2015 |  |  | $ | 3,467 |
2016 |  |  | $ | 1,161 |
2017 |  |  | $ | 1,907 |
2018 |  |  | $ | 1,002 |
2019 |  |  | $ | 735 |
2020 | - | 2024 | $ | 4,239 |

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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=35743120&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e2417-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=34716465&loc=d3e4179-114921 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e2439-114920 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e2410-114920 + 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=35743120&loc=d3e1928-114920 + Details
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