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Note 14 - Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2016
Notes Tables |
Schedule of Defined Benefit Plans Disclosures [Table Text Block] |
|  | Year Ended December 31, |
|  | 201 6 |  |  | 201 5 |
Accumulated benefit obligation at end of period |  | $ | 65,956 |  |  | $ | 63,894 |
Change in projected benefit obligation |  |  |  |  |  |  |  |
Projected benefit obligation at beginning of period |  | $ | 63,894 |  |  | $ | 68,376 |
Interest cost |  |  | 2,747 |  |  |  | 2,681 |
Net actuarial loss (gain) |  |  | 1,363 |  |  |  | (5,254 | )
Benefits paid |  |  | (2,048 | ) |  |  | (1,909 | )
Projected benefit obligation at end of period |  | $ | 65,956 |  |  | $ | 63,894 |
Change in plan assets |  |  |  |  |  |  |  |
Fair value of plan assets at beginning of period |  | $ | 43,985 |  |  | $ | 45,452 |
Actual return (loss) on plan assets |  |  | 3,820 |  |  |  | (384 | )
Company contributions |  |  | 731 |  |  |  | 826 |
Benefits paid |  |  | (2,048 | ) |  |  | (1,909 | )
Fair value of plan assets at end of period |  | $ | 46,488 |  |  | $ | 43,985 |
Funded status: accrued pension liability included in other long-term liabilities |  | $ | (19,468 | ) |  | $ | (19,909 | )
Amounts recognized in accumulated other comprehensive loss |  |  |  |  |  |  |  |
Net actuarial loss, net of tax |  | $ | (11,040 | ) |  | $ | (11,362 | )
Schedule of Net Benefit Costs [Table Text Block] |
|  | Year E nded December 31, |
|  | 201 6 |  |  | 201 5 |  |  | 201 4 |
Interest cost |  | $ | 2,747 |  |  | $ | 2,681 |  |  | $ | 2,591 |
Expected return on plan assets |  |  | (2,868 | ) |  |  | (3,041 | ) |  |  | (2,933 | )
Amortization of net loss |  |  | 941 |  |  |  | 1,228 |  |  |  | 106 |
Net periodic pension (benefit) cost |  | $ | 820 |  |  | $ | 868 |  |  | $ | (236 | )
Schedule of Assumptions Used [Table Text Block] |
|  | December 31, |
|  | 201 6 |  |  | 201 5 |
Discount rate – salaried pension plan |  |  | 4.14 | % |  |  | 4.36 | %
Discount rate – hourly pension plan |  |  | 4.16 | % |  |  | 4.39 | %
Rate of compensation increase (1) |  |  | n/a |  |  |  | n/a |
Schedule of Allocation of Plan Assets [Table Text Block] |
|  |  |  |  |  | December 31, 201 6 |  |  | December 31, 201 5 |
Asset Category |  | Target |  |  | Dollars |  |  | % |  |  | Dollars |  |  | % |
Fixed Income |  |  | 20 | % |  | $ | 7,812 |  |  |  | 17 | % |  | $ | 8,571 |  |  |  | 19 | %
Domestic equity |  |  | 49 | % |  |  | 19,615 |  |  |  | 42 | % |  |  | 20,479 |  |  |  | 47 | %
International equity |  |  | 21 | % |  |  | 13,466 |  |  |  | 29 | % |  |  | 9,687 |  |  |  | 22 | %
Real estate |  |  | 10 | % |  |  | 5,595 |  |  |  | 12 | % |  |  | 5,248 |  |  |  | 12 | %
Total |  |  | 100 | % |  | $ | 46,488 |  |  |  | 100 | % |  | $ | 43,985 |  |  |  | 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 U nobservable I nputs (L evel 3) |
Mutual fund s |  | $ | 37,860 |  |  | $ | 37,860 |  |  | $ | – |  |  | $ | – |
Other investments |  |  | 8,628 |  |  |  | – |  |  |  | – |  |  |  | 8,628 |
Total |  | $ | 46,488 |  |  | $ | 37,860 |  |  | $ | – |  |  | $ | 8,628 |
|  | 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 s |  | $ | 40,310 |  |  | $ | 40,310 |  |  | $ | – |  |  | $ | – |
Other investment s |  |  | 3,675 |  |  |  | – |  |  |  | – |  |  |  | 3,675 |
Total |  | $ | 43,985 |  |  | $ | 40,310 |  |  | $ | – |  |  | $ | 3,675 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] |
|  | Year Ended December 31, |
|  | 2016 |  |  | 2015 |
Balance at beginning of period |  | $ | 3,675 |  |  | $ | 3,185 |
Purchases |  |  | 4,400 |  |  |  | 408 |
Realized gains |  |  | 553 |  |  |  | 82 |
Balance at end of period |  | $ | 8,628 |  |  | $ | 3,675 |
Schedule of Expected Benefit Payments [Table Text Block] |
201 7 |  | $ | 2,258 |
201 8 |  |  | 2,354 |
201 9 |  |  | 2,430 |
20 20 |  |  | 2,556 |
202 1 |  |  | 2,692 |
2022 – 2026 |  |  | 16,021 |
Net periodic Benefit Costs [Member] |
Notes Tables |
Schedule of Assumptions Used [Table Text Block] |
|  | Y ear E nded December 31, |
|  | 201 6 |  |  | 201 5 |  |  | 201 4 |
Discount rate |  |  | 4.39 | % |  |  | 3.99 | % |  |  | 5.01 | %
Expected long-term rate of return on plan assets |  |  | 6.62 | % |  |  | 6.75 | % |  |  | 6.88 | %
Rate of compensation increase (1) |  |  | n/a |  |  |  | n/a |  |  |  | n/a |

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