Schedule II - Valuation and Qualifying Accounts - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022		Dec. 25, 2021	Dec. 26, 2020
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
Balance, beginning of year		$ 290		$ 128	$ 9
Additions (reductions) not charged to expense	[1]	(8)		14	(1)
Additions (reduction) charged (credited) to expense		122		149	79
Deductions/write-offs		205		1	(41)
Balance, end of year		199		290	128
SEC Schedule, 12-09, Reserve, Inventory [Member]
Balance, beginning of year		23,012		26,937	20,958
Additions (reductions) not charged to expense	[1]	698	[2]	(2,926)	4,611
Additions (reduction) charged (credited) to expense		7,179		7,102	8,117
Deductions/write-offs		4,018		8,101	6,749
Balance, end of year		$ 26,871		$ 23,012	$ 26,937

[1] Changes in reserve balances resulting from foreign currency impact and reclassifications from other reserves.

[2] Reductions not charged to expense includes $2,206 transferred as part of the sale of our PCB Test business.