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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 29, 2018 | Dec. 30, 2017 | Dec. 31, 2016 | Jan. 02, 2016
Tax Credit Carryforward [Line Items] |  |  |  |
Federal statutory rate |  | 35.00% | 35.00% | 35.00%
Foreign operating loss carryforward |  | $ 759 |  |
Net tax expense |  | 30,136 |  |
Operating loss carryforward valuation allowance |  | 12,823 |  |
Accrual of withholding taxes on foreign earnings |  | 12,562 |  |
Foreign tax credit carryforwards |  | 2,278 |  |
Revaluation of deferred tax assets and liabilities |  | 2,681 |  |
Repatriation tax |  | 2,070 |  |
Valuation allowance on foreign tax credit |  | 10,057 |  |
Valuation allowance on research credit |  | 633 |  |
Valuation allowance on mirrored deferred tax assets |  | 2,133 |  |
Unlimited carryforward |  | 2,203 |  |
Net operating losses |  | 795 | $ 424 |
Scenario, Plan [Member] |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Federal statutory rate | 21.00% |  |  |
Domestic And Foreign Tax Authority [Member] |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Net operating losses |  | $ 398 |  |
Minimum [Member] | Research Tax Credit Carryforward [Member] |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Expiration year for tax credit carryforwards |  | 2036 |  |
Minimum [Member] | Foreign Tax Authority [Member] |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Expiration year for tax credit carryforwards |  | 2026 |  |
Maximum [Member] | Research Tax Credit Carryforward [Member] |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Expiration year for tax credit carryforwards |  | 2037 |  |
Maximum [Member] | Foreign Tax Authority [Member] |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Expiration year for tax credit carryforwards |  | 2027 |  |

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