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GOODWILL AND INTANGIBLE ASSETS - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands | Apr. 01, 2023 | Dec. 31, 2022
--- | --- | ---
Other intangible assets |  |
Gross | $ 1,729,855 | $ 1,687,390
Accumulated Amortization | (771,736) | (732,115)
Net | 958,119 | 955,275
Client relationships |  |
Other intangible assets |  |
Gross | 1,523,373 | 1,491,926
Accumulated Amortization | (624,820) | (591,417)
Net | 898,553 | 900,509
Technology |  |
Other intangible assets |  |
Gross | 140,448 | 129,626
Accumulated Amortization | (104,438) | (101,655)
Net | 36,010 | 27,971
Backlog |  |
Other intangible assets |  |
Gross | 15,320 | 15,236
Accumulated Amortization | (13,474) | (12,512)
Net | 1,846 | 2,724
Trademarks and trade names |  |
Other intangible assets |  |
Gross | 12,707 | 12,617
Accumulated Amortization | (4,704) | (4,410)
Net | 8,003 | 8,207
Other |  |
Other intangible assets |  |
Gross | 38,007 | 37,985
Accumulated Amortization | (24,300) | (22,121)
Net | $ 13,707 | $ 15,864

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