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Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Apr. 28, 2020 | Jan. 02, 2021 | Dec. 28, 2019 | Dec. 29, 2018
Subject to amortization: |  |  |  |
Weighted-Average Amortization Period (Years) |  | 8 years |  |
Gross Amount |  | $ 317,955 | $ 272,800 |
Accumulated Amortization |  | (163,624) | (138,521) |
Total Other Intangible Assets |  |  |  |
Gross Amount |  | 329,708 | 272,800 |
Removal of fully amortized intangible assets |  | 19,600 |  |
Amortization expense related to intangible assets |  | 44,700 | 39,500 | $ 38,000
Estimated aggregate amortization expense for intangible assets subject to amortization |  |  |  |
2021 |  | 44,358 |  |
2022 |  | 33,046 |  |
2023 |  | 24,324 |  |
2024 |  | 21,864 |  |
2025 |  | 12,200 |  |
Research and development |  |  |  |
Total Other Intangible Assets |  |  |  |
Amortization expense related to intangible assets |  | 33,200 | 29,500 | 27,300
Selling, general and administrative |  |  |  |
Total Other Intangible Assets |  |  |  |
Amortization expense related to intangible assets |  | 11,500 | 10,000 | 10,700
Cost of revenues |  |  |  |
Total Other Intangible Assets |  |  |  |
Amortization expense related to intangible assets |  | 0 | 0 | $ 0
In-process research and development |  |  |  |
Not subject to amortization: |  |  |  |
Not subject to amortization |  | 11,753 |  |
Redpine Signals |  |  |  |
Total Other Intangible Assets |  |  |  |
Gross intangible assets acquired |  | $ 76,500 |  |
Developed technology |  |  |  |
Subject to amortization: |  |  |  |
Weighted-Average Amortization Period (Years) |  | 8 years |  |
Gross Amount |  | $ 261,939 | 219,695 |
Accumulated Amortization |  | $ (125,435) | (111,634) |
Customer relationships |  |  |  |
Subject to amortization: |  |  |  |
Weighted-Average Amortization Period (Years) |  | 5 years |  |
Gross Amount |  | $ 43,245 | 40,795 |
Accumulated Amortization |  | $ (31,877) | (22,742) |
Customer relationships | Redpine Signals |  |  |  |
Subject to amortization: |  |  |  |
Weighted-Average Amortization Period (Years) | 2 years |  |  |
Trademarks |  |  |  |
Subject to amortization: |  |  |  |
Weighted-Average Amortization Period (Years) |  | 5 years |  |
Gross Amount |  | $ 12,771 | 12,310 |
Accumulated Amortization |  | $ (6,312) | $ (4,145) |
Trademarks | Redpine Signals |  |  |  |
Subject to amortization: |  |  |  |
Weighted-Average Amortization Period (Years) | 2 years |  |  |

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