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GOODWILL AND INTANGIBLE ASSETS - Schedule of Other Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 29, 2018	Dec. 30, 2017
Other intangible assets
Gross	$ 948,266	$ 655,971
Accumulated Amortization	(318,533)	(286,209)
Net	629,733	369,762
Backlog
Other intangible assets
Gross	20,900	8,111
Accumulated Amortization	(12,391)	(8,111)
Net	8,509	0
Technology
Other intangible assets
Gross	102,794	81,309
Accumulated Amortization	(39,271)	(27,157)
Net	63,523	54,152
Trademarks and trade names
Other intangible assets
Gross	8,466	8,661
Accumulated Amortization	(4,619)	(4,562)
Net	3,847	4,099
Other
Other intangible assets
Gross	17,532	17,465
Accumulated Amortization	(9,477)	(7,845)
Net	8,055	9,620
Other intangible assets
Other intangible assets
Gross	149,692	115,546
Accumulated Amortization	(65,758)	(47,675)
Net	83,934	67,871
Client relationships
Other intangible assets
Gross	798,574	540,425
Accumulated Amortization	(252,775)	(238,534)
Net	$ 545,799	$ 301,891

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