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GOODWILL AND INTANGIBLE ASSETS - Schedule of Other Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 30, 2017
Other intangible assets
Gross	$ 949,473	$ 655,971
Accumulated Amortization	(300,337)	(286,209)
Net	649,136	369,762
Backlog
Other intangible assets
Gross	20,900	8,111
Accumulated Amortization	(6,092)	(8,111)
Net	14,808	0
Technology
Other intangible assets
Gross	103,361	81,309
Accumulated Amortization	(34,686)	(27,157)
Net	68,675	54,152
Trademarks and trade names
Other intangible assets
Gross	8,541	8,661
Accumulated Amortization	(4,579)	(4,562)
Net	3,962	4,099
Other
Other intangible assets
Gross	17,319	17,465
Accumulated Amortization	(8,905)	(7,845)
Net	8,414	9,620
Other intangible assets
Other intangible assets
Gross	150,121	115,546
Accumulated Amortization	(54,262)	(47,675)
Net	95,859	67,871
Client relationships
Other intangible assets
Gross	799,352	540,425
Accumulated Amortization	(246,075)	(238,534)
Net	$ 553,277	$ 301,891

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