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Goodwill and Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 25, 2021	Dec. 26, 2020
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 212,761	$ 199,196
Foreign currency translation	(2,068)	2,346
Goodwill, ending balance	212,299	212,761
FRT GmbH
Goodwill [Roll Forward]
Goodwill, acquired during period		975
Baldwin Park
Goodwill [Roll Forward]
Goodwill, acquired during period	352	5,590
High Precision Devices, Inc.
Goodwill [Roll Forward]
Goodwill, acquired during period	1,254	4,654
Probe Cards
Goodwill [Roll Forward]
Goodwill, beginning balance	178,072	172,482
Foreign currency translation	0	0
Goodwill, ending balance	178,424	178,072
Probe Cards | FRT GmbH
Goodwill [Roll Forward]
Goodwill, acquired during period		0
Probe Cards | Baldwin Park
Goodwill [Roll Forward]
Goodwill, acquired during period	352	5,590
Probe Cards | High Precision Devices, Inc.
Goodwill [Roll Forward]
Goodwill, acquired during period	0	0
Systems
Goodwill [Roll Forward]
Goodwill, beginning balance	34,689	26,714
Foreign currency translation	(2,068)	2,346
Goodwill, ending balance	33,875	34,689
Systems | FRT GmbH
Goodwill [Roll Forward]
Goodwill, acquired during period		975
Systems | Baldwin Park
Goodwill [Roll Forward]
Goodwill, acquired during period	0	0
Systems | High Precision Devices, Inc.
Goodwill [Roll Forward]
Goodwill, acquired during period	$ 1,254	$ 4,654

X

- Definition

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.

+ References

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-Publisher FASB
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- Definition

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.

+ References

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- Definition

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.

+ References

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+ References

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