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SEGMENT AND GEOGRAPHIC INFORMATION - Revenue and Other Financial Information by Reportable Segment (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Apr. 01, 2023 | Mar. 26, 2022
Segment Reporting Information [Line Items] |  |
Revenue | $ 1,029,373 | $ 913,929
Operating income | 167,892 | 148,778
Depreciation and amortization | 77,069 | 75,299
Capital expenditures | 106,875 | 80,464
Unallocated corporate |  |
Segment Reporting Information [Line Items] |  |
Operating income | (46,054) | (50,458)
Depreciation and amortization | 1,046 | 559
Capital expenditures | 869 | 60
RMS |  |
Segment Reporting Information [Line Items] |  |
Revenue | 199,766 | 176,542
RMS | Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Revenue | 199,766 | 176,542
Operating income | 40,409 | 47,882
Depreciation and amortization | 13,489 | 9,469
Capital expenditures | 19,084 | 8,646
DSA |  |
Segment Reporting Information [Line Items] |  |
Revenue | 662,353 | 544,259
DSA | Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Revenue | 662,353 | 544,259
Operating income | 171,431 | 104,986
Depreciation and amortization | 42,450 | 46,789
Capital expenditures | 65,184 | 48,930
Manufacturing |  |
Segment Reporting Information [Line Items] |  |
Revenue | 167,254 | 193,128
Manufacturing | Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Revenue | 167,254 | 193,128
Operating income | 2,106 | 46,368
Depreciation and amortization | 20,084 | 18,482
Capital expenditures | $ 21,738 | $ 22,828

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