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Note 14 - Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2015
Net periodic Benefit Costs [Member] |
Notes Tables |
Schedule of Assumptions Used [Table Text Block] |
|  | Y ear E nded December 31, |
|  | 201 5 |  |  | 201 4 |  |  | 201 3 |
Discount rate |  |  | 3.99 | % |  |  | 5.01 | % |  |  | 4.14 | %
Expected long-term rate of return on plan assets |  |  | 6.75 | % |  |  | 6.88 | % |  |  | 6.95 | %
Rate of compensation increase (1) |  |  | n/a |  |  |  | n/a |  |  |  | n/a |
Schedule of Defined Benefit Plans Disclosures [Table Text Block] |
|  | Year Ended December 31, |
|  | 2015 |  |  | 2014 |
Accumulated benefit obligation at end of period |  | $ | 63,894 |  |  | $ | 68,376 |
Change in projected benefit obligation |  |  |  |  |  |  |  |
Projected benefit obligation at beginning of period |  | $ | 68,376 |  |  | $ | 52,825 |
Interest cost |  |  | 2,681 |  |  |  | 2,591 |
Net actuarial loss (gain) |  |  | (5,254 | ) |  |  | 14,791 |
Benefits paid |  |  | (1,909 | ) |  |  | (1,831 | )
Projected benefit obligation at end of period |  | $ | 63,894 |  |  | $ | 68,376 |
Change in plan assets |  |  |  |  |  |  |  |
Fair value of plan assets at beginning of period |  | $ | 45,452 |  |  | $ | 42,440 |
Actual return (loss) on plan assets |  |  | (384 | ) |  |  | 3,110 |
Company contributions |  |  | 826 |  |  |  | 1,733 |
Benefits paid |  |  | (1,909 | ) |  |  | (1,831 | )
Fair value of plan assets at end of period |  | $ | 43,985 |  |  | $ | 45,452 |
Funded status: accrued pension liability included in other long-term liabilities |  | $ | (19,909 | ) |  | $ | (22,924 | )
Amounts recognized in accumulated other comprehensive loss |  |  |  |  |  |  |  |
Net actuarial loss |  | $ | (11,362 | ) |  | $ | (13,243 | )
Schedule of Net Benefit Costs [Table Text Block] |
|  | Year E nded December 31, |
|  | 201 5 |  |  | 201 4 |  |  | 201 3 |
Components of net periodic pension (benefit) cost: |  |  |  |  |  |  |  |  |  |  |  |
Interest cost |  | $ | 2,681 |  |  | $ | 2,591 |  |  | $ | 2,423 |
Expected return on plan assets |  |  | (3,041 | ) |  |  | (2,933 | ) |  |  | (2,520 | )
Amortization of net loss |  |  | 1,228 |  |  |  | 106 |  |  |  | 1,108 |
Net periodic pension (benefit) cost |  | $ | 868 |  |  | $ | (236 | ) |  | $ | 1,011 |
Schedule of Assumptions Used [Table Text Block] |
|  | December 31, |
|  | 2015 |  |  | 2014 |
Discount rate – salaried pension plan |  |  | 4.36 | % |  |  | 3.97 | %
Discount rate – hourly pension plan |  |  | 4.39 | % |  |  | 3.99 | %
Rate of compensation increase (1) |  |  | n/a |  |  |  | n/a |
Schedule of Allocation of Plan Assets [Table Text Block] |
|  |  |  |  |  | December 31, 2015 |  |  | December 31, 2014 |
Asset Category |  | Target |  |  | Dollars |  |  | % |  |  | Dollars |  |  | % |
Fixed Income |  |  | 20% |  |  | $ | 8,571 |  |  |  | 19 | % |  | $ | 7,400 |  |  |  | 16 | %
Domestic equity |  |  | 49% |  |  |  | 20,479 |  |  |  | 47 | % |  |  | 24,373 |  |  |  | 54 | %
International equity |  |  | 21% |  |  |  | 9,687 |  |  |  | 22 | % |  |  | 8,869 |  |  |  | 19 | %
Real estate |  |  | 10% |  |  |  | 5,248 |  |  |  | 12 | % |  |  | 4,810 |  |  |  | 11 | %
Total |  |  | 100% |  |  | $ | 43,985 |  |  |  | 100 | % |  | $ | 45,452 |  |  |  | 100 | %
Schedule of Fair Value of Plan Assets [Table Text Block] |
|  | Total |  |  | Quoted Prices in Active Markets for Identical A sset (L evel 1) |  |  | Significant Observable I nputs (L evel 2) |  |  | Significant Unobservable I nputs (L evel 3) |
Mutual funds |  | $ | 40,310 |  |  | $ | 40,310 |  |  | $ | – |  |  | $ | – |
Other investments |  |  | 3,675 |  |  |  | – |  |  |  | – |  |  |  | 3,675 |
Total |  | $ | 43,985 |  |  | $ | 40,310 |  |  | $ | – |  |  | $ | 3,675 |
|  | Total |  |  | Quoted Prices in Active Markets for Identical A sset (L evel 1) |  |  | Significant O b servable I nputs (L evel 2) |  |  | Significant Unobservable I nputs (L evel 3) |
Mutual funds |  | $ | 42,267 |  |  | $ | 42,267 |  |  | $ | – |  |  | $ | – |
Other investments |  |  | 3,185 |  |  |  | – |  |  |  | – |  |  |  | 3,185 |
Total |  | $ | 45,452 |  |  | $ | 42,267 |  |  | $ | – |  |  | $ | 3,185 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] |
|  | 2015 |  |  | 2014 |
Balance at beginning of period |  | $ | 3,185 |  |  | $ | – |
Purchases |  |  | 408 |  |  |  | 3,100 |
Realized gains |  |  | 82 |  |  |  | 85 |
Balance at end of period |  | $ | 3,675 |  |  | $ | 3,185 |
Schedule of Expected Benefit Payments [Table Text Block] |
Year |  |  |  |  |
2016 |  |  |  |  | $ | 2,052 |
2017 |  |  |  |  |  | 2,231 |
2018 |  |  |  |  |  | 2,340 |
2019 |  |  |  |  |  | 2,424 |
2020 |  |  |  |  |  | 2,552 |
2021 | – | 2025 |  |  |  | 15,238 |

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