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Note 7 - Pensions and Other Postretirement Benefits (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Schedule of Changes in Projected Benefit Obligations [Table Text Block] |
|  | Pension Plan |  |  | Postretirement Plan |
|  | 201 7 |  |  | 201 6 |  |  | 201 7 |  |  | 201 6 |
Accumulated benefit obligation at end of year |  | $ | 63,173 |  |  | $ | 64,033 |  |  | $ | 17,367 |  |  | $ | 22,340 |
Change in projected benefit obligation: |  |  |  |  |  |  |  |  |
Benefit obligation at beginning of year |  | $ | 77,107 |  |  | $ | 77,600 |  |  | $ | 22,340 |  |  | $ | 22,430 |
Service cost |  |  | 2,727 |  |  |  | 2,837 |  |  |  | 1,249 |  |  |  | 1,192 |
Interest cost |  |  | 2,537 |  |  |  | 2,643 |  |  |  | 814 |  |  |  | 842 |
Plan Changes |  |  | - |  |  |  | - |  |  |  | (6,646 | ) |  |  | - |
Settlement |  |  | 1,398 |  |  |  | - |  |  |  | - |  |  |  | - |
Benefits paid |  |  | (12,066 | ) |  |  | (5,510 | ) |  |  | (2,278 | ) |  |  | (1,637 | )
Effect of foreign exchange |  |  | - |  |  |  | - |  |  |  | 24 |  |  |  | 7 |
Actuarial loss (gain) |  |  | 4,786 |  |  |  | (463 | ) |  |  | 1,864 |  |  |  | (494 | )
Benefit obligation at end of year |  | $ | 76,489 |  |  | $ | 77,107 |  |  | $ | 17,367 |  |  | $ | 22,340 |
Change in plan assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Plan assets at beginning of year |  | $ | 83,318 |  |  | $ | 68,291 |  |  | $ | - |  |  | $ | - |
Actual return on plan assets |  |  | 7,550 |  |  |  | 4,537 |  |  |  | - |  |  |  | - |
Emplo yer contributions |  |  | 2,000 |  |  |  | 16,000 |  |  |  | 2,278 |  |  |  | 1,637 |
Benefits paid |  |  | (12,066 | ) |  |  | (5,510 | ) |  |  | (2,278 | ) |  |  | (1,637 | )
Plan assets at end of year |  |  | 80,802 |  |  |  | 83,318 |  |  |  | - |  |  |  | - |
Funded status at end of year |  | $ | 4,313 |  |  | $ | 6,211 |  |  | $ | (17,367 | ) |  | $ | (22,340 | )
|  | Pension Plan |  |  | Postretirement Plan |
|  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
Amounts recognized in the Consolidated Balance Sheets consist of: |  |  |  |  |  |  |  |  |  |  |  |  |
Noncurrent assets |  | $ | 4,313 |  |  | $ | 6,211 |  |  | $ | - |  |  | $ | - |
Current liabilities |  |  | - |  |  |  | - |  |  |  | (1,630 | ) |  |  | (1,631 | )
Noncurrent liabilities |  |  | - |  |  |  | - |  |  |  | (15,737 | ) |  |  | (20,709 | )
Total assets (liabilities) |  | $ | 4,313 |  |  | $ | 6,211 |  |  | $ | (17,367 | ) |  | $ | (22,340 | )
Amounts recognized in accumulated other comprehensive loss consist of: |  |  |  |  |  |  |  |  |
Net actuarial loss (gain) |  | $ | 24,571 |  |  | $ | 27,041 |  |  | $ | (5,377 | ) |  | $ | (7,890 | )
Prior Service Cost |  |  | - |  |  |  | - |  |  |  | (6,646 | ) |  |  | - |
Deferred tax (benefit) expense |  |  | (9,223 | ) |  |  | (10,506 | ) |  |  | 3,683 |  |  |  | 2,978 |
After tax actuarial loss (gain) |  | $ | 15,348 |  |  | $ | 16,535 |  |  | $ | (8,340 | ) |  | $ | (4,912 | )
Schedule of Costs of Retirement Plans [Table Text Block] |
Components of net periodic benefit cost: |  |  |  |  |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Pension Plan |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 2,727 |  |  | $ | 2,837 |  |  | $ | 3,064 |
Interest cost |  |  | 2,537 |  |  |  | 2,643 |  |  |  | 2,640 |
Expected return on plan assets |  |  | (4,697 | ) |  |  | (4,150 | ) |  |  | (4,060 | )
Recognized actuarial loss |  |  | 1,770 |  |  |  | 2,101 |  |  |  | 2,230 |
Settlement loss |  |  | 4,031 |  |  |  | - |  |  |  | 3,783 |
Net periodic benefit cost |  | $ | 6,368 |  |  | $ | 3,431 |  |  | $ | 7,657 |
Other changes in pension plan assets and benefit obligations recognized in other comprehensive loss: |
Net (gain) loss |  | $ | (2,470 | ) |  | $ | (2,952 | ) |  | $ | 1,156 |
Total expense (income) recognized in net periodic benefit cost and other comprehensive income |  | $ | 3,898 |  |  | $ | 479 |  |  | $ | 8,813 |
Postretirement Plan |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 1,249 |  |  | $ | 1,192 |  |  | $ | 1,194 |
Interest cost |  |  | 814 |  |  |  | 842 |  |  |  | 790 |
Recognized actuarial gain |  |  | (677 | ) |  |  | (699 | ) |  |  | (649 | )
Net periodic benefit cost |  | $ | 1,386 |  |  | $ | 1,335 |  |  | $ | 1,335 |
Other changes in po stretirement plan assets and benefit obligations recognized in other comprehensive loss: |
Net (gain) loss |  | $ | (4,105 | ) |  | $ | 205 |  |  | $ | (529 | )
Total (benefit) expense recognized in net periodic benefit cost and other comprehensive income |  | $ | (2,719 | ) |  | $ | 1,540 |  |  | $ | 806 |
Schedule of Assumptions Used [Table Text Block] |
|  | Pension Plan |  |  | Postretirement Plan |
|  | 201 7 |  |  | 201 6 |  |  | 201 7 |  |  | 201 6 |
Weighted-average assumptions used to determine benefit obligations at December 31: |  |  |  |  |  |  |  |  |
Discount rate |  |  | 3.27 | % |  |  | 3.60 | % |  |  | 3.39 | % |  |  | 3.77 | %
Rate of compensation inc rease |  |  | 3.50 | % |  |  | 3.50 | % |  |  | – |  |  |  | – |
Weighted-average assumptions used to determine net periodic benefit cost for years ended December 31: |  |  |  |  |  |  |  |  |
Discount rate |  |  | 3.27 | % |  |  | 3.70 | % |  |  | 3.77 | % |  |  | 3.90 | %
Expected long-term rate of return on plan assets |  |  | 6.00 | % |  |  | 6.00 | % |  |  | – |  |  |  | – |
Rate of c ompensation Increase |  |  | 3.50 | % |  |  | 3.50 | % |  |  | – |  |  |  | – |
Schedule of Allocation of Plan Assets [Table Text Block] |
201 7 |  |  |  |  |  | % |
Level 1 : |  |  |  |  |  |  |  |  |
Equity |  | $ | 14,637 |  |  |  | 18 | %
Fixed income |  |  | 12,573 |  |  |  | 16 | %
Mutual funds |  |  | 857 |  |  |  | 1 | %
Money funds and cash |  |  | 6,173 |  |  |  | 8 | %
Total Level 1 |  |  | 34,240 |  |  |  | 43 | %
Level 2 : |  |  |  |  |  |  |  |  |
Fixed income |  |  | 46,556 |  |  |  | 57 | %
Money funds |  |  |  |  |  |  |  |  |
Total Level 2 |  |  | 46,556 |  |  |  | 57 | %
Level 3: |  |  |  |  |  |  |  |  |
Equity |  |  | 6 |  |  |  | - |
Total Level 3 |  |  | 6 |  |  |  | - |
Total fair value of Plan assets |  | $ | 80,802 |  |  |  | 100 | %
2016 |  |  |  |  |  | % |
Level 1: |  |  |  |  |  |  |  |
Equity |  | $ | 19,752 |  |  |  | 24 | %
Fixed income |  |  | 11,805 |  |  |  | 14 | %
Mutual funds |  |  | - |  |  |  | - |
Money f unds and cash |  |  | 11,134 |  |  |  | 13 | %
Total Level 1 |  |  | 42,691 |  |  |  | 51 | %
Level 2: |  |  |  |  |  |  |  |
Fixed income |  |  | 40,597 |  |  |  | 49 | %
Money fund s |  |  | - |  |  |  | - |
Total Level 2 |  |  | 40,597 |  |  |  | 49 | %
Level 3: |  |  |  |  |  |  |  |
Equity |  |  | 30 |  |  |  | - |
Total Level 3 |  |  | 30 |  |  |  | - |
Total fair value of Plan assets |  | $ | 83,318 |  |  |  | 100 | %
Schedule of Expected Benefit Payments [Table Text Block] |
|  | 201 8 |  |  | 201 9 |  |  | 20 20 |  |  | 202 1 |  |  | 202 2 |  |  | Thereafter |
Pension |  | $ | 4,274 |  |  | $ | 4,251 |  |  | $ | 5,427 |  |  | $ | 5,046 |  |  | $ | 5,964 |  |  | $ | 26,953 |
Postretirement |  |  | 1,657 |  |  |  | 1,519 |  |  |  | 1,373 |  |  |  | 1,215 |  |  |  | 1,157 |  |  |  | 5,960 |

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