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Restructuring Costs - Changes in Accrued Restructuring (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 28, 2019	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Restructuring Plan 2020
Restructuring Reserve [Roll Forward]
(Reversal) Provision		$ 1,118
Usage		(1,052)
Currency translation		(5)
Balance at end of period		61
Restructuring Plan 2019
Restructuring Reserve [Roll Forward]
Balance at beginning of period		84
(Reversal) Provision			$ 192
Usage		(90)	(109)
Currency translation		6	1
Balance at end of period	$ 84	0	84
Restructuring Plan 2017
Restructuring Reserve [Roll Forward]
Balance at beginning of period		63	63	$ 203
(Reversal) Provision				1,717
Usage		(3)	0	(1,840)
Currency translation				(17)
Balance at end of period	63	60	63	63	$ 203
Severance | Restructuring Plan 2020
Restructuring Reserve [Roll Forward]
(Reversal) Provision		1,118
Usage		(1,052)
Currency translation		(5)
Balance at end of period		61
Severance | Restructuring Plan 2019
Restructuring Reserve [Roll Forward]
Balance at beginning of period		84
(Reversal) Provision	192		192
Usage		(90)	(109)
Currency translation		6	1
Balance at end of period	84	0	84
Severance | Restructuring Plan 2017
Restructuring Reserve [Roll Forward]
Balance at beginning of period		63	63	203
(Reversal) Provision				(55)	203
Usage		(3)	0	(77)
Currency translation				(8)
Balance at end of period	63	60	63	63	203
Relocation | Restructuring Plan 2020
Restructuring Reserve [Roll Forward]
(Reversal) Provision		0
Usage		0
Currency translation		0
Balance at end of period		0
Relocation | Restructuring Plan 2019
Restructuring Reserve [Roll Forward]
Balance at beginning of period		0
(Reversal) Provision			0
Usage		0	0
Currency translation		0	0
Balance at end of period	0	0	0
Relocation | Restructuring Plan 2017
Restructuring Reserve [Roll Forward]
Balance at beginning of period		0	0	0
(Reversal) Provision				1,318
Usage		0	0	(1,315)
Currency translation				(3)
Balance at end of period	0	0	0	0	0
Other | Restructuring Plan 2020
Restructuring Reserve [Roll Forward]
(Reversal) Provision		0
Usage		0
Currency translation		0
Balance at end of period		0
Other | Restructuring Plan 2019
Restructuring Reserve [Roll Forward]
Balance at beginning of period		0
(Reversal) Provision			0
Usage		0	0
Currency translation		0	0
Balance at end of period	0	0	0
Other | Restructuring Plan 2017
Restructuring Reserve [Roll Forward]
Balance at beginning of period		0	0	0
(Reversal) Provision				454
Usage		0	0	(448)
Currency translation				(6)
Balance at end of period	$ 0	$ 0	$ 0	$ 0	$ 0

X

- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

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Amount of foreign currency translation gain (loss) which decreases (increases) the restructuring reserve.

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