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

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

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