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Income Taxes - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 17, 2018 | Dec. 29, 2018 | Sep. 29, 2018 | Dec. 26, 2020 | Dec. 28, 2019 | Dec. 29, 2018
Income Tax Contingency |  |  |  |  |  |
TCJA one-time charge |  | $ 3,200 |  |  |  |
Toll charge, noncurrent |  |  |  | $ 20,800 |  |
Toll charge, current |  |  |  | 3,000 |  |
Change in unrecognized tax benefits |  |  |  |  | $ 3,300 |
Income taxes paid |  |  |  | 35,200 | 47,600 | $ 46,200
Income tax refunds |  |  |  | 7,600 | 7,100 | 4,300
Unremitted earnings of the Company’s non-U.S. subsidiaries |  |  |  | 767,000 |  |
Deferred tax liabilities recognized on foreign earnings |  |  |  | $ 14,200 | 13,000 |
Income tax holiday per diluted share (in dollars per share) |  |  |  | $ 0.17 |  |
Interest expense |  |  |  | $ 1,600 | 1,300 | 1,500
Decrease due to a lapse in the statute of limitations |  |  |  |  | 600 | 300
Interest accrued |  |  |  | 8,800 | 7,200 |
Unrecognized tax benefits |  | 18,259 |  | 17,437 | 16,721 | $ 18,259
Canada Revenue Agency |  |  |  |  |  |
Income Tax Contingency |  |  |  |  |  |
Potential tax charges |  |  |  | 3,000 |  |
China |  |  |  |  |  |
Income Tax Contingency |  |  |  |  |  |
Tax holidays |  |  |  | 4,100 |  |
Foreign Tax Authority |  |  |  |  |  |
Income Tax Contingency |  |  |  |  |  |
Deferred tax liabilities recognized on foreign earnings |  |  |  | 13,900 | 12,600 |
Domestic Tax Authority |  |  |  |  |  |
Income Tax Contingency |  |  |  |  |  |
Deferred tax liabilities recognized on foreign earnings |  |  |  | $ 300 | $ 400 |
Toll Charge |  |  |  |  |  |
Income Tax Contingency |  |  |  |  |  |
TCJA one-time charge |  | 2,300 |  |  |  |
Toll Charge | IXYS Corporation |  |  |  |  |  |
Income Tax Contingency |  |  |  |  |  |
TCJA one-time charge | $ 7,000 | 7,000 | $ (2,000) |  |  |
Other Items |  |  |  |  |  |
Income Tax Contingency |  |  |  |  |  |
TCJA one-time charge |  | $ 900 |  |  |  |

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