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Restructuring Charges - Narrative (Details) $ in Thousands |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Dec. 23, 2019 office | Dec. 29, 2018 | Oct. 04, 2020 USD ($) | Dec. 29, 2019 USD ($) | Sep. 29, 2019 USD ($) | Oct. 04, 2020 USD ($) | Sep. 29, 2019 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring Charges |  |  | $ (1,881) |  | $ 672 | $ (3,156) | $ 672
Number of employees |  | 200 |  |  |  |  |
2018 and 2019 Restructuring Plan [Member] |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring Reserve |  |  | 3,900 |  |  | 3,900 |
2019 Restructuring Plan [Member] |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring Charges |  |  |  | $ 9,000 |  | 2,234 |
Restructuring Reserve |  |  | 3,752 | 8,773 |  | 3,752 |
Number of employees | 105 |  |  |  |  |  |
Severance costs |  |  |  | 8,800 |  |  |
Estimated restructuring costs remaining |  |  | 9,000 |  |  | 9,000 |
Expected savings from restructuring |  |  | 6,000 |  |  | 6,000 |
2019 Restructuring Plan [Member] | Workforce Reduction |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring Charges |  |  |  |  |  | 2,234 |
Restructuring Reserve |  |  | $ 3,752 | 8,634 |  | $ 3,752 |
Number Of office leases | office | 2 |  |  |  |  |  |
2019 Restructuring Plan [Member] | Facility Closing [Member] |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring Charges |  |  |  | $ 200 |  |  |

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