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SEGMENT AND GEOGRAPHIC INFORMATION - Revenue and Other Financial Information by Reportable Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 24, 2022 | Sep. 30, 2023 | Sep. 24, 2022
Segment Reporting Information [Line Items] |  |  |  |
Revenue | $ 1,026,623 | $ 989,157 | $ 3,115,933 | $ 2,876,217
Operating income | 151,502 | 150,976 | 484,339 | 487,165
Depreciation and amortization | 78,870 | 74,605 | 233,610 | 226,325
Capital expenditures | 65,947 | 72,393 | 240,205 | 235,709
Unallocated corporate |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating income | (49,918) | (58,537) | (165,886) | (152,406)
Depreciation and amortization | 840 | 559 | 2,961 | 1,685
Capital expenditures | 439 | 113 | 2,010 | 3,166
RMS |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 186,848 | 180,114 | 596,562 | 543,066
RMS | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 186,848 | 180,114 | 596,562 | 543,066
Operating income | 28,326 | 35,891 | 117,653 | 123,299
Depreciation and amortization | 13,872 | 13,128 | 41,310 | 35,825
Capital expenditures | 9,192 | 10,743 | 35,769 | 33,239
DSA |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 664,028 | 619,463 | 1,989,838 | 1,755,639
DSA | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 664,028 | 619,463 | 1,989,838 | 1,755,639
Operating income | 146,819 | 142,143 | 479,788 | 375,922
Depreciation and amortization | 44,088 | 43,913 | 129,662 | 135,328
Capital expenditures | 41,967 | 43,400 | 155,477 | 133,908
Manufacturing |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 175,747 | 189,580 | 529,533 | 577,512
Manufacturing | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 175,747 | 189,580 | 529,533 | 577,512
Operating income | 26,275 | 31,479 | 52,784 | 140,350
Depreciation and amortization | 20,070 | 17,005 | 59,677 | 53,487
Capital expenditures | $ 14,349 | $ 18,137 | $ 46,949 | $ 65,396

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