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GOODWILL AND INTANGIBLE ASSETS - Amortized Intangible Assets - (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 25, 2022 | Mar. 26, 2022 | Jun. 26, 2021 | Jun. 25, 2022 | Jun. 26, 2021 | Dec. 25, 2021
Components of amortized intangible assets |  |  |  |  |  |
Gross Carrying Amount | $ 312,479 |  |  | $ 312,479 |  | $ 290,680
Accumulated Amortization | 185,909 |  |  | 185,909 |  | 178,723
Amortization expense for intangible assets | 5,531 |  | $ 5,182 | 11,380 | $ 9,414 |
Estimated amortization expense |  |  |  |  |  |
2022 | 21,425 |  |  | 21,425 |  |
2023 | 19,588 |  |  | 19,588 |  |
2024 | 17,675 |  |  | 17,675 |  |
2025 | 16,241 |  |  | 16,241 |  |
2026 | 15,823 |  |  | 15,823 |  |
Customer Relationships |  |  |  |  |  |
Components of amortized intangible assets |  |  |  |  |  |
Gross Carrying Amount | 246,965 |  |  | 246,965 |  | 224,597
Accumulated Amortization | 163,494 |  |  | $ 163,494 |  | 160,626
Weighted Average Life |  | 13 years |  | 13 years |  |
Patents & Proprietary Technology |  |  |  |  |  |
Components of amortized intangible assets |  |  |  |  |  |
Gross Carrying Amount | 58,188 |  |  | $ 58,188 |  | 58,699
Accumulated Amortization | 17,861 |  |  | $ 17,861 |  | 13,955
Weighted Average Life |  | 9 years |  | 9 years |  |
Other |  |  |  |  |  |
Components of amortized intangible assets |  |  |  |  |  |
Gross Carrying Amount | 4,476 |  |  | $ 4,476 |  | 4,534
Accumulated Amortization | 4,113 |  |  | $ 4,113 |  | 3,959
Weighted Average Life |  | 6 years |  | 6 years |  |
Trade Names |  |  |  |  |  |
Components of amortized intangible assets |  |  |  |  |  |
Gross Carrying Amount | 2,850 |  |  | $ 2,850 |  | 2,850
Accumulated Amortization | $ 441 |  |  | $ 441 |  | $ 183
Weighted Average Life |  | 7 years |  | 7 years |  |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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