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Income Taxes (Effect Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 28, 2018 | Dec. 29, 2017 | Dec. 30, 2016
Income Tax Disclosure [Abstract] |  |  |
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Provisional Undistributed Accumulated Earnings Of Foreign Subsidiary |  | $ 147,500 |
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Statutory rate | $ 12,834 | 17,240 | $ 9,858
Federal tax credits | (1,700) | (1,674) | (1,570)
Foreign rate differential | (6,040) | (12,934) | (9,665)
Uncertain tax positions | 147 | 34 | 219
State taxes, net of federal benefit | 975 | (543) | (311)
Valuation allowance | (567) | 1,030 | 1,273
Change in tax rates | 0 | 0 | (270)
Change in unremitted earnings assertion | 11 | (39,394) |
Change in tax law (Internal Revenue Code §987) | 0 | 0 | 2,630
Other | (2,050) | (3,058) | (1,397)
Effective tax rate | $ 14,083 | $ (37,828) | $ 3,287
Effective Income Tax Rate Reconciliation, Percent [Abstract] |  |  |
Statutory rate | 21.00% | 35.00% | 35.00%
Federal tax credits | (2.80%) | (3.40%) | (5.60%)
Foreign rate differential | (9.90%) | (26.30%) | (34.30%)
Uncertain tax positions | 0.20% | 0.10% | 0.80%
State taxes, net of federal benefit | 1.60% | (1.10%) | (1.10%)
Valuation allowance | (0.90%) | 2.10% | 4.50%
Change in tax rates | 0.00% | 0.00% | (1.00%)
Change in unremitted earnings assertion | 0.00% | (80.00%) |
Change in tax law (Internal Revenue Code §987) | 0.00% | 0.00% | 9.30%
Other | (3.30%) | (6.20%) | (5.00%)
Effective tax rate | 23.00% | (76.80%) | 11.70%
Non-deductible transaction costs |  |  | $ 1,012
Non-deductible transaction costs, percent |  |  | 3.60%
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent | $ 10,473 | $ 1,471 | $ 1,508
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent | 17.10% | 3.00% | 5.40%

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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in income tax contingencies. Including, but not limited to, domestic tax contingency, foreign tax contingency, state and local tax contingency, and other contingencies. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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