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GOODWILL AND INTANGIBLE ASSETS - Schedule of Other Intangible Assets (Details) - USD ($) $ in Thousands | Jun. 29, 2019 | Dec. 29, 2018
--- | --- | ---
Other intangible assets |  |
Gross | $ 1,108,334 | $ 939,910
Accumulated Amortization | (373,633) | (329,022)
Net | 734,701 | 610,888
Backlog |  |
Other intangible assets |  |
Gross | 28,761 | 20,900
Accumulated Amortization | (21,314) | (18,691)
Net | 7,447 | 2,209
Technology |  |
Other intangible assets |  |
Gross | 121,717 | 101,506
Accumulated Amortization | (48,712) | (41,870)
Net | 73,005 | 59,636
Trademarks and trade names |  |
Other intangible assets |  |
Gross | 8,273 | 8,331
Accumulated Amortization | (4,715) | (4,640)
Net | 3,558 | 3,691
Other |  |
Other intangible assets |  |
Gross | 17,629 | 17,448
Accumulated Amortization | (11,130) | (10,041)
Net | 6,499 | 7,407
Other intangible assets |  |
Other intangible assets |  |
Gross | 176,380 | 148,185
Accumulated Amortization | (85,871) | (75,242)
Net | 90,509 | 72,943
Client relationships |  |
Other intangible assets |  |
Gross | 931,954 | 791,725
Accumulated Amortization | (287,762) | (253,780)
Net | $ 644,192 | $ 537,945

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