Summary of Significant Accounting Policies - Changes in Carrying Amounts of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 29, 2019	Dec. 30, 2018
Goodwill [Roll Forward]
BALANCE DECEMBER 31, 2018	$ 245,815	$ 68,754
ACQUISITIONS	0	183,348
PURCHASE PRICE ACCOUNTING ADJUSTMENTS	17,181	1,377
IMPAIRMENT	0	0
FOREIGN CURRENCY TRANSLATION	(5,557)	(7,664)
BALANCE DECEMBER 29, 2019	$ 257,439	$ 245,815

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of loss from the write-down of an 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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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an 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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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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