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GOODWILL AND INTANGIBLE ASSETS - Schedule of Other Intangible Assets (Details) - USD ($) $ in Thousands | Jun. 27, 2020 | Dec. 28, 2019
--- | --- | ---
Other intangible assets |  |
Gross | $ 1,275,891 | $ 1,112,348
Accumulated Amortization | (469,700) | (422,935)
Net | 806,191 | 689,413
Backlog |  |
Other intangible assets |  |
Gross | 28,660 | 28,865
Accumulated Amortization | (27,703) | (26,895)
Net | 957 | 1,970
Technology |  |
Other intangible assets |  |
Gross | 123,682 | 122,106
Accumulated Amortization | (67,548) | (57,737)
Net | 56,134 | 64,369
Trademarks and trade names |  |
Other intangible assets |  |
Gross | 15,458 | 8,430
Accumulated Amortization | (5,138) | (4,901)
Net | 10,320 | 3,529
Other |  |
Other intangible assets |  |
Gross | 20,056 | 18,279
Accumulated Amortization | (13,497) | (12,307)
Net | 6,559 | 5,972
Other intangible assets |  |
Other intangible assets |  |
Gross | 187,856 | 177,680
Accumulated Amortization | (113,886) | (101,840)
Net | 73,970 | 75,840
Customer Relationships |  |
Other intangible assets |  |
Gross | 1,088,035 | 934,668
Accumulated Amortization | (355,814) | (321,095)
Net | $ 732,221 | $ 613,573

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