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Goodwill and Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 26, 2021 | Dec. 26, 2020
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | $ 212,761 | $ 199,196
Foreign currency translation | (576) | 2,346
Goodwill, ending balance | 214,548 | 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 | 2,011 | 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 | (576) | 2,346
Goodwill, ending balance | 36,124 | 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 | $ 2,011 | $ 4,654

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- 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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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 Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
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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 Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
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