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GOODWILL AND INTANGIBLE ASSETS - Intangible Assets, Net by Major Class (Details) - USD ($) $ in Thousands | Dec. 29, 2018 | Dec. 30, 2017
--- | --- | ---
Finite-lived intangible assets |  |
Gross | $ 939,910 | $ 655,971
Accumulated Amortization | (329,022) | (286,209)
Net | 610,888 | 369,762
Backlog |  |
Finite-lived intangible assets |  |
Gross | 20,900 | 8,111
Accumulated Amortization | (18,691) | (8,111)
Net | 2,209 | 0
Technology |  |
Finite-lived intangible assets |  |
Gross | 101,506 | 81,309
Accumulated Amortization | (41,870) | (27,157)
Net | 59,636 | 54,152
Trademarks and trade names |  |
Finite-lived intangible assets |  |
Gross | 8,331 | 8,661
Accumulated Amortization | (4,640) | (4,562)
Net | 3,691 | 4,099
Other |  |
Finite-lived intangible assets |  |
Gross | 17,448 | 17,465
Accumulated Amortization | (10,041) | (7,845)
Net | 7,407 | 9,620
Other intangible assets |  |
Finite-lived intangible assets |  |
Gross | 148,185 | 115,546
Accumulated Amortization | (75,242) | (47,675)
Net | 72,943 | 67,871
Client relationships |  |
Finite-lived intangible assets |  |
Gross | 791,725 | 540,425
Accumulated Amortization | (253,780) | (238,534)
Net | $ 537,945 | $ 301,891

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