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Income Taxes (Details 3) - USD ($) $ in Thousands | Jan. 02, 2021 | Dec. 28, 2019 | Dec. 29, 2018
--- | --- | --- | ---
Deferred Tax Assets: |  |  |
Tax credit carryforwards | $ 197,436 | $ 206,008 |
Reserves and accruals | 60,272 | 47,562 |
Intangible assets | 578,267 | 583,323 |
Capitalized research and development expense for income tax purposes | 39,427 | 18,477 |
Operating loss carryforwards | 5,935 | 6,201 |
Deferred income | 21,170 | 16,704 |
Capital loss carryforwards | 16,944 | 17,320 |
Stock-based compensation costs | 14,656 | 15,097 |
Depreciation and amortization | 4,402 | 8,721 |
Investments | 2,521 | 2,459 |
Lease liability | 31,278 | 25,016 |
Total deferred tax assets | 972,308 | 946,888 |
Valuation allowance | (116,419) | (125,520) | $ (108,700)
Net deferred tax assets | 855,889 | 821,368 |
Deferred Tax Liabilities: |  |  |
Intangible assets | (44,549) | (24,907) |
Undistributed foreign earnings | (41,957) | (31,916) |
ROU assets | (31,278) | (25,016) |
Other | (10,749) | (8,350) |
Total deferred tax liabilities | (128,533) | (90,189) |
Total net deferred tax assets | $ 727,356 | $ 731,179 |

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