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SEGMENT AND GEOGRAPHIC INFORMATION - Revenue and Other Financial Information by Reportable Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 01, 2023 | Jun. 25, 2022 | Jul. 01, 2023 | Jun. 25, 2022
Segment Reporting Information [Line Items] |  |  |  |
Revenue | $ 1,059,937 | $ 973,131 | $ 2,089,310 | $ 1,887,060
Operating income | 164,945 | 187,411 | 332,837 | 336,189
Depreciation and amortization | 77,671 | 76,421 | 154,740 | 151,720
Capital expenditures | 67,383 | 82,852 | 174,258 | 163,316
Unallocated Corporate |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating income | (69,914) | (43,411) | (115,968) | (93,869)
Depreciation and amortization | 1,075 | 567 | 2,121 | 1,126
Capital expenditures | 702 | 2,993 | 1,571 | 3,053
RMS |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 209,948 | 186,410 | 409,714 | 362,952
RMS | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 209,948 | 186,410 | 409,714 | 362,952
Operating income | 48,918 | 39,526 | 89,327 | 87,408
Depreciation and amortization | 13,949 | 13,228 | 27,438 | 22,697
Capital expenditures | 7,493 | 13,850 | 26,577 | 22,496
DSA |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 663,457 | 591,917 | 1,325,810 | 1,136,176
DSA | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 663,457 | 591,917 | 1,325,810 | 1,136,176
Operating income | 161,538 | 128,793 | 332,969 | 233,779
Depreciation and amortization | 43,124 | 44,626 | 85,574 | 91,415
Capital expenditures | 48,326 | 41,578 | 113,510 | 90,508
Manufacturing |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 186,532 | 194,804 | 353,786 | 387,932
Manufacturing | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 186,532 | 194,804 | 353,786 | 387,932
Operating income | 24,403 | 62,503 | 26,509 | 108,871
Depreciation and amortization | 19,523 | 18,000 | 39,607 | 36,482
Capital expenditures | $ 10,862 | $ 24,431 | $ 32,600 | $ 47,259

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