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GOODWILL AND INTANGIBLE ASSETS - Schedule of Other Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 29, 2019	Dec. 29, 2018
Other intangible assets
Gross	$ 1,108,334	$ 939,910
Accumulated Amortization	(373,633)	(329,022)
Net	734,701	610,888
Backlog
Other intangible assets
Gross	28,761	20,900
Accumulated Amortization	(21,314)	(18,691)
Net	7,447	2,209
Technology
Other intangible assets
Gross	121,717	101,506
Accumulated Amortization	(48,712)	(41,870)
Net	73,005	59,636
Trademarks and trade names
Other intangible assets
Gross	8,273	8,331
Accumulated Amortization	(4,715)	(4,640)
Net	3,558	3,691
Other
Other intangible assets
Gross	17,629	17,448
Accumulated Amortization	(11,130)	(10,041)
Net	6,499	7,407
Other intangible assets
Other intangible assets
Gross	176,380	148,185
Accumulated Amortization	(85,871)	(75,242)
Net	90,509	72,943
Client relationships
Other intangible assets
Gross	931,954	791,725
Accumulated Amortization	(287,762)	(253,780)
Net	$ 644,192	$ 537,945

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