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GOODWILL AND INTANGIBLE ASSETS - Intangible Assets, Net by Major Class (Details) - USD ($) $ in Thousands | Dec. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Finite-lived intangible assets |  |
Gross | $ 655,971 | $ 623,870
Accumulated Amortization | (286,209) | (229,422)
Net | 369,762 | 394,448
Backlog |  |
Finite-lived intangible assets |  |
Gross | 8,111 | 8,370
Accumulated Amortization | (8,111) | (6,390)
Net | 0 | 1,980
Technology |  |
Finite-lived intangible assets |  |
Gross | 81,309 | 71,425
Accumulated Amortization | (27,157) | (14,314)
Net | 54,152 | 57,111
Trademarks and trade names |  |
Finite-lived intangible assets |  |
Gross | 8,661 | 8,177
Accumulated Amortization | (4,562) | (4,124)
Net | 4,099 | 4,053
Other |  |
Finite-lived intangible assets |  |
Gross | 17,465 | 16,775
Accumulated Amortization | (7,845) | (5,628)
Net | 9,620 | 11,147
Other intangible assets |  |
Finite-lived intangible assets |  |
Gross | 115,546 | 104,747
Accumulated Amortization | (47,675) | (30,456)
Net | 67,871 | 74,291
Client relationships |  |
Finite-lived intangible assets |  |
Gross | 540,425 | 519,123
Accumulated Amortization | (238,534) | (198,966)
Net | $ 301,891 | $ 320,157

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