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Note 15 - Employee Benefit Plans (Details Textual) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) | Jan. 01, 2017 USD ($) | Jan. 03, 2016 USD ($)
Defined Contribution Plan Eligibility Period | 180 days |  |
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax | $ 56,554 | $ 54,862 |
Foreign Plan [Member] |  |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 2,812 | 4,991 |
Pension Cost (Reversal of Cost) | 1,900 | 1,200 | $ 2,100
Defined Benefit Plan, Funded (Unfunded) Status of Plan | (13,382) | (19,448) |
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax | $ 47,972 | 49,236 |
Number of Defined Benefit Plans | 2 |  |
Defined Benefit Plan, Expected Amortization, Next Fiscal Year | $ 1,200 |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax | 7,000 |  |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax | 5,800 |  |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax | (1,200) |  |
Defined Benefit Plan, Indexation Benefit | 32,700 | 32,200 |
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year | 3,300 |  |
Defined Benefit Plan, Accumulated Benefit Obligation | 313,257 | 274,414 |
Foreign Plan [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |
AOCI Tax, Attributable to Parent | 15,000 |  |
UNITED STATES |  |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 1,900 |  |
Defined Benefit Plan, Expected Amortization, Next Fiscal Year | 500 |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax | 1,700 |  |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax | (2,000) |  |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax | $ (300) |  |
Normal Retirement Age | 65 |  |
Early Retirement Age | 55 |  |
Minimum Period Of Service For Entitlement In Plan | 15 years |  |
Minimum Period Under Death Benefit Feature | 10 years |  |
Maximum Period For Death Benefits Payable To Designated Beneficiary | 10 years |  |
Defined Benefit Plan, Accumulated Benefit Obligation | $ 31,900 | 29,700 |
Other Comprehensive Income (Loss), Increase in Minimum Pension Liability | 1,300 |  |
Deferred Compensation, Excluding Share-based Payments and Retirement Benefits [Member] |  |  |
Deferred Compensation Liability, Current and Noncurrent | 31,900 |  |
Investment in Insurance Instruments | 28,000 |  |
The 401(k) Plan [Member] |  |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 3,000 | 3,100 | 2,900
Defined Contribution Plan, Employer Discretionary Contribution Amount | $ 0 | $ 0 | $ 0

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- Definition Maximum Period For Death Benefits Payable To Designated Beneficiary + References No definition available. + Details
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