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REVENUE FROM CONTRACTS WITH CUSTOMERS - Narrative (Details) - USD ($) $ in Thousands | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 29, 2024 | Jul. 01, 2023 | Dec. 30, 2023 | Dec. 31, 2022
Disaggregation of Revenue [Line Items] |  |  |  |
Percentage of unbilled revenue billed during period | 85.00% | 85.00% |  |
Unbilled revenue | $ 218,889 |  | $ 228,020 | $ 204,000
Percentage of contract liabilities recognized as revenue during period | 70.00% | 75.00% |  |
Contract liabilities |  |  | 273,000 | $ 290,000
Unpaid advanced client billings | $ 46,000 |  | $ 41,000 |
Net provision expense | 4,100 | $ 9,200 |  |
Performance obligations expected to be satisfied | $ 856,600 |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-06-30 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, remaining performance obligation, percentage | 50.00% |  |  |
Performance obligations expected to be satisfied, expected timing | 12 months |  |  |

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- Definition Amount, before allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-3 + Details
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