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Note 14 - 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] |
|  | Year Ended December 31, |
|  | 2014 |  |  | 2013 |
Accumulated benefit obligation at end of period |  | $ | 68,376 |  |  | $ | 52,825 |
Change in projected benefit obligation |  |  |  |  |  |  |  |
Projected benefit obligation at beginning of period |  | $ | 52,825 |  |  | $ | 59,744 |
Interest cost |  |  | 2,591 |  |  |  | 2,423 |
Net actuarial loss (gain) |  |  | 14,791 |  |  |  | (7,695 | )
Benefits paid |  |  | (1,831 |  |  |  | (1,647 | )
Projected benefit obligation at end of period |  | $ | 68,376 |  |  | $ | 52,825 |
Change in plan assets |  |  |  |  |  |  |  |
Fair value of plan assets at beginning of period |  | $ | 42,440 |  |  | $ | 36,570 |
Actual return on plan assets |  |  | 3,110 |  |  |  | 6,465 |
Company contributions |  |  | 1,733 |  |  |  | 1,052 |
Benefits paid |  |  | (1,831 |  |  |  | (1,647 | )
Fair value of plan assets at end of period |  | $ | 45,452 |  |  | $ | 42,440 |
Funded status: accrued pension liability included in other long-term liabilities |  | $ | (22,924 |  |  | $ | (10,385 | )
Amounts recognized in accumulated other comprehensive income |  |  |  |  |  |  |  |
Net actuarial loss |  | $ | (13,243 |  |  | $ | (4,393 | )
Schedule of Net Benefit Costs [Table Text Block] |
|  | Year E nded December 31, |
|  | 201 4 |  |  | 201 3 |  |  | 201 2 |
Components of net periodic pension (benefit) cost: |  |  |  |  |  |  |  |  |  |  |  |
Interest cost |  | $ | 2,591 |  |  | $ | 2,423 |  |  | $ | 2,453 |
Expected return on plan assets |  |  | (2,933 | ) |  |  | (2,520 | ) |  |  | (2,398 | )
Amortization of net loss |  |  | 106 |  |  |  | 1,108 |  |  |  | 909 |
Net periodic pension (benefit) cost |  | $ | (236 | ) |  | $ | 1,011 |  |  | $ | 964 |
Schedule of Assumptions Used [Table Text Block] |
|  | December 31, |
|  | 2014 |  |  | 2013 |
Discount rate - salaried pension plan |  |  | 3.97 | % |  |  | 4.98 | %
Discount rate - hourly pension plan |  |  | 3.99 | % |  |  | 5.01 | %
Rate of compensation increase (1) |  |  | n/a |  |  |  | n/a |
Schedule of Net Periodic Benefit Cost Not yet Recognized [Table Text Block] |
|  | Y ear E nded December 31, |
|  | 201 4 |  |  | 201 3 |  |  | 201 2 |
Discount rate |  |  | 5.01 | % |  |  | 4.14 | % |  |  | 4.65 | %
Expected long-term rate of return on plan assets |  |  | 6.88 |  |  |  | 6.95 |  |  |  | 7.57 |
Rate of compensation increase (1) |  |  | n/a |  |  |  | n/a |  |  |  | n/a |
Schedule of Allocation of Plan Assets [Table Text Block] |
|  |  |  |  |  | December 31, 2014 |  |  | December 31, 2013 |
Asset Category |  | Target |  |  | Dollars |  |  | % |  |  | Dollars |  |  | % |
Fixed Income |  |  | 24 | % |  | $ | 7,400 |  |  |  | 16 | % |  | $ | 7,307 |  |  |  | 17 | %
Domestic equity |  |  | 49 | % |  |  | 24,373 |  |  |  | 54 | % |  |  | 23,903 |  |  |  | 56 | %
International equity |  |  | 17 | % |  |  | 8,869 |  |  |  | 19 | % |  |  | 7,424 |  |  |  | 18 | %
Real estate |  |  | 10 | % |  |  | 4,810 |  |  |  | 11 | % |  |  | 3,806 |  |  |  | 9 | %
Total |  |  | 100 | % |  | $ | 45,452 |  |  |  | 100 | % |  | $ | 42,440 |  |  |  | 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 fund |  | $ | 42,267 |  |  | $ | 42,267 |  |  | $ | - |  |  | $ | - |
Other investments |  |  | 3,185 |  |  |  | - |  |  |  | - |  |  |  | 3,185 |
Total |  | $ | 45,452 |  |  | $ | 42,267 |  |  | $ | - |  |  | $ | 3,185 |
|  | 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 fund |  | $ | 39,759 |  |  | $ | 39,759 |  |  | $ | - |  |  | $ | - |
Collective trust |  |  | 2,681 |  |  |  | - |  |  |  | 2,681 |  |  |  | - |
Total |  | $ | 42,440 |  |  | $ | 39,759 |  |  | $ | 2,681 |  |  | $ | - |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] |
|  | Other I nvestments |
Balance as of December 31, 2013 |  | $ | - |
Purchases |  |  | 3,100 |
Realized gains |  |  | 85 |
Balance as of December 31, 2014 |  | $ | 3,185 |
Schedule of Expected Benefit Payments [Table Text Block] |
Year |  |  |  |  |
2015 |  | $ | 1,888 |
2016 |  |  | 1,998 |
2017 |  |  | 2,185 |
2018 |  |  | 2,319 |
2019 |  |  | 2,430 |
2020 - 2024 |  |  | 14,500 |

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