Fair value portion of assets classified as held for sale.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Fair value portion of asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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Value of the investment at close of period. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities.

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Fair Value Measurements - Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2021	Jun. 30, 2020	Jun. 29, 2021	Jun. 30, 2020	Dec. 29, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in unconsolidated affiliates , total gain (loss)	$ 239	$ (90)	$ 22	$ (598)
Level 3 \| Fair value measured on a nonrecurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-lived assets held for sale	1,175		1,175		$ 1,645
Goodwill, FairValue Measurements					2,625
Investments in unconsolidated affiliates, fair value measurements	$ 1,000		1,000		$ 1,531
Long-lived assets held for sale, total gain (loss)			(470)
Investments in unconsolidated affiliates , total gain (loss)			(531)	$ (528)
Level 3 \| Fair value measured on a nonrecurring basis \| China Joint Venture
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in unconsolidated affiliates , total gain (loss)			$ (500)
Ownership percentage	40.00%		40.00%