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GOODWILL AND INTANGIBLE ASSETS - Schedule of Other Intangible Assets (Details) - USD ($) $ in Thousands | Mar. 28, 2020 | Dec. 28, 2019
--- | --- | ---
Other intangible assets |  |
Gross | $ 1,273,123 | $ 1,112,348
Accumulated Amortization | (440,260) | (422,935)
Net | 832,863 | 689,413
Backlog |  |
Other intangible assets |  |
Gross | 28,558 | 28,865
Accumulated Amortization | (27,133) | (26,895)
Net | 1,425 | 1,970
Technology |  |
Other intangible assets |  |
Gross | 123,647 | 122,106
Accumulated Amortization | (62,307) | (57,737)
Net | 61,340 | 64,369
Trademarks and trade names |  |
Other intangible assets |  |
Gross | 15,504 | 8,430
Accumulated Amortization | (4,983) | (4,901)
Net | 10,521 | 3,529
Other |  |
Other intangible assets |  |
Gross | 19,874 | 18,279
Accumulated Amortization | (12,813) | (12,307)
Net | 7,061 | 5,972
Other intangible assets |  |
Other intangible assets |  |
Gross | 187,583 | 177,680
Accumulated Amortization | (107,236) | (101,840)
Net | 80,347 | 75,840
Customer Relationships |  |
Other intangible assets |  |
Gross | 1,085,540 | 934,668
Accumulated Amortization | (333,024) | (321,095)
Net | $ 752,516 | $ 613,573

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