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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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