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Discontinued Operations (Details) $ in Thousands |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jul. 02, 2020 USD ($) | Jul. 04, 2021 USD ($) | Dec. 31, 2020 USD ($) | Jun. 28, 2020 USD ($) | Jul. 04, 2021 USD ($) | Jun. 28, 2020 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Proceeds from disposal of business, net of cash sold |  |  |  |  | $ 10,798 | $ 0
Asset impairment charges |  |  |  |  | 6,995 | 113,007
Capital expenditure, discontinued operations |  |  |  | $ 8,500 |  | 16,400
Stock-based compensation, income |  |  |  | 0 |  | 900
Grass Valley |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Accrued interest |  | $ 4,000 |  |  | $ 7,700 |
Equity interest in divested business | $ 3,000 |  |  |  |  |
Equity interest in divested business, percentage | 9.00% |  |  |  |  |
Proceeds from sale and maturity of marketable securities |  |  | $ 2,700 |  |  |
Asset impairment charges |  |  |  | $ 89,800 |  | $ 113,000
Grass Valley | Discontinued Operations, Disposed of by Sale |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Proceeds from divestiture of businesses | $ 120,000 |  |  |  |  |
Proceeds from disposal of business, net of cash sold | 56,200 |  |  |  |  |
Deferred consideration - seller's note | 175,000 |  |  |  |  |
Paid-in-kind interest | 88,000 |  |  |  |  |
Deferred compensation - earnout payments | $ 178,000 |  |  |  |  |
Payment in kind, annual interest rate | 0.085 |  |  |  |  |
Fair value of note | $ 34,900 |  |  |  |  |

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