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Note 9 - Employee Retirement Plans (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Schedule of Allocation of Plan Assets [Table Text Block] |
|  |  |  |  |  | Actual as of |  |  | Actual as of |
|  | Target |  |  | December 31, 2020 |  |  | December 31, 2019 |
U.S. Pension plan: |  |  |  |  |  |  |  |  |  |  |  |
Cash |  |  | — | % |  |  | 3 | % |  |  | — | %
Debt securities |  |  | 50 | % |  |  | 53 | % |  |  | 96 | %
Equity securities |  |  | 50 | % |  |  | 44 | % |  |  | 4 | %
Total |  |  | 100 | % |  |  | 100 | % |  |  | 100 | %
Schedule Of Fair Value Plan Assets Measured On Recurring Basis [Table Text Block] |
|  |  |  |  |  | Quoted prices in |  |  | Significant |  |  | Significant |  |  |  |  |
|  |  |  |  |  | active |  |  | observable |  |  | unobservable |  |  | Measured at |
|  |  |  |  |  | markets |  |  | inputs |  |  | inputs |  |  | Net Asset |
(In thousands) |  | Fair Value |  |  | (Level 1) |  |  | (Level 2) |  |  | (Level 3) |  |  | Value |
Pension plan measured at fair value: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity securities, primarily exchange traded funds |  | $ | 24,947 |  |  |  | 21,780 |  |  |  | — |  |  |  | — |  |  |  | 3,167 |
Debt securities, primarily exchange traded funds |  |  | 29,922 |  |  |  | 17,925 |  |  |  | — |  |  |  | — |  |  |  | 11,997 |
Cash and cash equivalents |  |  | 1,626 |  |  |  | — |  |  |  | 1,626 |  |  |  | — |  |  |  | — |
Total fair value of plan assets |  | $ | 56,495 |  |  |  | 39,705 |  |  |  | 1,626 |  |  |  | — |  |  |  | 15,164 |
|  |  |  |  |  | Quoted prices in |  |  | Significant |  |  | Significant |  |  |  |  |
|  |  |  |  |  | active |  |  | observable |  |  | unobservable |  |  | Measured at |
|  |  |  |  |  | markets |  |  | inputs |  |  | inputs |  |  | Net Asset |
(In thousands) |  | Fair Value |  |  | (Level 1) |  |  | (Level 2) |  |  | (Level 3) |  |  | Value |
Pension plan measured at fair value: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity securities: |  | $ | 699 |  |  |  | 699 |  |  |  | — |  |  |  | — |  |  |  | — |
Debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Government securities |  |  | 5,870 |  |  |  | 5,870 |  |  |  | — |  |  |  | — |  |  |  | — |
Collateralized mortgage securities |  |  | 765 |  |  |  | — |  |  |  | 765 |  |  |  | — |  |  |  | — |
Corporate debt securities |  |  | 47,839 |  |  |  | — |  |  |  | 47,839 |  |  |  | — |  |  |  | — |
Cash and cash equivalents |  |  | 2,526 |  |  |  | — |  |  |  | 2,526 |  |  |  | — |  |  |  | — |
Other |  |  | 1,396 |  |  |  | — |  |  |  | 1,396 |  |  |  | — |  |  |  | — |
Total |  | $ | 59,095 |  |  |  | 6,569 |  |  |  | 52,526 |  |  |  | — |  |  |  | — |
Accrued income |  |  | 530 |  |  |  | 530 |  |  |  | — |  |  |  | — |  |  |  | — |
Total fair value of plan assets |  | $ | 59,625 |  |  |  | 7,099 |  |  |  | 52,526 |  |  |  | — |  |  |  | — |
Schedule of Net Funded Status [Table Text Block] |
|  | Year Ended December 31, |
(In thousands) |  | 2020 |  |  | 2019 |  |  | 2018 |
Change in benefit obligation: |  |  |  |  |  |  |  |  |  |  |  |
Benefit obligation at beginning of the period |  | $ | 91,654 |  |  | $ | 90,247 |  |  | $ | 103,443 |
Increase in benefit obligation due to business combination |  |  | — |  |  |  | — |  |  |  | 5,474 |
Service cost |  |  | 112 |  |  |  | 427 |  |  |  | 294 |
Interest cost |  |  | 2,907 |  |  |  | 3,751 |  |  |  | 3,605 |
Benefits paid |  |  | (5,990 | ) |  |  | (5,967 | ) |  |  | (5,467 | )
Actuarial (gain) loss (A) |  |  | 5,277 |  |  |  | 8,198 |  |  |  | (8,105 | )
Settlement |  |  | (4,407 | ) |  |  | (4,978 | ) |  |  | (8,885 | )
Foreign currency exchange rate changes |  |  | (593 | ) |  |  | (24 | ) |  |  | (112 | )
Benefit obligation at end of the period |  | $ | 88,960 |  |  | $ | 91,654 |  |  | $ | 90,247 |
Change in plan assets: |  |  |  |  |  |  |  |  |  |  |  |
Fair value of plan assets at beginning of the period |  | $ | 59,625 |  |  | $ | 56,790 |  |  | $ | 57,536 |
Increase in plan assets due to business combination |  |  | — |  |  |  | — |  |  |  | 5,463 |
Actual return |  |  | 6,890 |  |  |  | 7,498 |  |  |  | (2,128 | )
Expected return |  |  | — |  |  |  | — |  |  |  | 112 |
Actuarial loss |  |  | 18 |  |  |  | 983 |  |  |  | (275 | )
Administrative expenses |  |  | (49 | ) |  |  | (68 | ) |  |  | (36 | )
Employer contributions |  |  | 1,615 |  |  |  | 5,027 |  |  |  | 10,546 |
Benefits paid |  |  | (5,990 | ) |  |  | (5,967 | ) |  |  | (5,467 | )
Settlement |  |  | (5,000 | ) |  |  | (4,638 | ) |  |  | (8,885 | )
Foreign currency exchange rate changes |  |  | (614 | ) |  |  | — |  |  |  | (76 | )
Fair value of plan assets at end of the period |  |  | 56,495 |  |  |  | 59,625 |  |  |  | 56,790 |
Payroll tax unrecognized in benefit obligation at end of the period |  |  | — |  |  |  | — |  |  |  | 84 |
Unfunded status at end of the period |  | $ | (32,465 | ) |  | $ | (32,029 | ) |  | $ | (33,541 | )
Net amount recognized in the balance sheet consists of: |  |  |  |  |  |  |  |  |  |  |  |
Current liabilities |  | $ | (1,524 | ) |  | $ | (1,422 | ) |  | $ | (1,380 | )
Noncurrent liabilities |  |  | (30,941 | ) |  |  | (30,607 | ) |  |  | (32,161 | )
Net amount recognized |  | $ | (32,465 | ) |  | $ | (32,029 | ) |  | $ | (33,541 | )
|  | Other Benefits |
|  | Year Ended |
(In thousands) |  | December 31, 2018 |
Change in benefit obligation: |  |  |  |
Benefit obligation at beginning of the period |  | $ | 2,924 |
Service cost |  |  | 61 |
Interest cost |  |  | 117 |
Participant contributions |  |  | 218 |
Plan amendment |  |  | (2,954 | )
Benefits paid |  |  | (595 | )
Actuarial loss |  |  | 229 |
Benefit obligation at end of the period |  | $ | — |
Change in plan assets: |  |  |  |
Fair value of plan assets at beginning of the period |  | $ | — |
Employer contributions |  |  | 377 |
Participant contributions |  |  | 218 |
Benefits paid |  |  | (595 | )
Fair value of plan assets at end of the period |  |  | — |
Unfunded status at end of the period |  | $ | — |
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Table Text Block] |
|  | December 31, |  |  | December 31, |
(In thousands) |  | 2020 |  |  | 2019 |
Projected benefit obligation |  | $ | 88,960 |  |  | $ | 91,654 |
Accumulated benefit obligation |  |  | 88,960 |  |  |  | 91,109 |
Fair value of plan assets |  |  | 56,495 |  |  |  | 59,625 |
Schedule of Net Benefit Costs [Table Text Block] |
|  | Year Ended December 31, |
(In thousands) |  | 2020 |  |  | 2019 |  |  | 2018 |
Service cost |  | $ | 109 |  |  | $ | 427 |  |  |  | 294 |
Interest cost |  |  | 2,907 |  |  |  | 3,751 |  |  |  | 3,605 |
Expected return on plan assets |  |  | (2,191 | ) |  |  | (2,375 | ) |  |  | (2,042 | )
Administrational expenses |  |  | 49 |  |  |  | 71 |  |  |  | 36 |
Payroll tax of net pension costs |  |  | 14 |  |  |  | 55 |  |  |  | 42 |
Amortization of net actuarial losses |  |  | (5 | ) |  |  | (592 | ) |  |  | 30 |
Recognized actuarial loss |  |  | — |  |  |  | — |  |  |  | — |
Settlement/Curtailment (gain) loss |  |  | 738 |  |  |  | (219 | ) |  |  | 335 |
Net periodic pension cost |  | $ | 1,621 |  |  | $ | 1,118 |  |  |  | 2,300 |
Schedule of Costs of Retirement Plans [Table Text Block] |
|  | Year Ended |
(In thousands) |  | December 31, 2018 |
Service cost |  | $ | 61 |
Interest cost |  |  | 117 |
Amortization of prior service cost |  |  | (299 | )
Recognized actuarial loss |  |  | 42 |
Net curtailment gain |  |  | (4,005 | )
Net periodic postretirement benefit |  | $ | (4,084 | )
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] |
|  | Pension Benefits |
|  | Year Ended December 31, |
(In thousands) |  | 2020 |  |  | 2019 |  |  | 2018 |
Net (gain) loss |  | $ | (568 | ) |  | $ | 2,612 |  |  |  | (3,441 | )
Settlement recognized |  |  | — |  |  |  | (182 | ) |  |  | (335 | )
Total recognized in other comprehensive (income) loss, before tax and net of tax |  | $ | (568 | ) |  | $ | 2,430 |  |  |  | (3,776 | )
|  | Other Benefits |
|  | Year |
|  | Ended |
|  | December 31, |
(In thousands) |  | 2018 |
Net (gain) loss |  | $ | 229 |
Amortization of prior service (cost) credit |  |  | 1,861 |
Amortization of net (loss) gain |  |  | (554 | )
Total recognized in other comprehensive (income) loss, before tax and net of tax |  | $ | 1,536 |
Defined Benefit Plan, Assumptions [Table Text Block] |
|  | Pension Benefits |
|  | 2020 |  |  | 2019 |
Discount rate |  |  | 3.5 | % |  |  | 4.5 | %
Expected long-term rate of return on assets |  |  | 4.0 | % |  |  | 4.0 | %
Rates of annual increase in compensation levels |  |  | 2.3 | % |  |  | 2.8 | %
Schedule of Expected Benefit Payments [Table Text Block] |
|  | Pension |
Year ending December 31, (In thousands) |  | Benefits |
2021 |  | $ | 5,860 |
2022 |  |  | 5,833 |
2023 |  |  | 5,777 |
2024 |  |  | 5,762 |
2025 |  |  | 5,686 |
2026 – 2030 |  |  | 26,605 |
Total 10-year estimated future benefit payments |  | $ | 55,523 |

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