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Related Party Transactions (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2025	Jun. 29, 2024	Jun. 28, 2025	Jun. 29, 2024	Dec. 28, 2024
Related Party Transaction
Sales to related party	$ 613,413	$ 558,489	$ 1,167,720	$ 1,093,874
Accounts receivable balance	363,574		363,574		$ 294,371
Accounts payable balance	181,902		181,902		188,359
Related Party \| Powersem
Related Party Transaction
Sales to related party	300	400
Purchase material/service from related party	600	1,200
Accounts receivable balance	100		100		0
Accounts payable balance	0		0		700
Related Party \| EB Tech
Related Party Transaction
Sales to related party	0	0
Purchase material/service from related party	500	200
Accounts receivable balance	0		0		0
Accounts payable balance	100		100		100
Related Party \| ATEC
Related Party Transaction
Sales to related party	0	0
Purchase material/service from related party	1,400	$ 800
Accounts receivable balance	0		0		0
Accounts payable balance	$ 600		$ 600		$ 700
Powersem \| Related Party
Related Party Transaction
Ownership percentage (as a percent)	45.00%		45.00%
Sales to related party			$ 600	900
Purchase material/service from related party			$ 1,100	2,400
EB Tech \| Related Party
Related Party Transaction
Ownership percentage (as a percent)	15.00%		15.00%
Sales to related party			$ 0	0
Purchase material/service from related party			$ 700	400
ATEC \| Related Party
Related Party Transaction
Ownership percentage (as a percent)	24.00%		24.00%
Sales to related party			$ 0	0
Purchase material/service from related party			$ 3,300	$ 2,900