INTANGIBLE ASSETS (Details) (USD $) In Thousands, unless otherwise specified	Sep. 27, 2014	Dec. 28, 2013
Intangible assets subject to amortization:
Intangible assets	$ 41,772	$ 49,037
Developed technology
Intangible assets subject to amortization:
Intangible assets	24,227	26,805
Accumulated amortization	16,143	14,079
Customer relationships
Intangible assets subject to amortization:
Intangible assets	9,971	13,795
Accumulated amortization	36,327	32,614
In-process research and development
Intangible assets subject to amortization:
Intangible assets	6,576	7,162
Accumulated amortization	1,310	759
Other intangible assets
Intangible assets subject to amortization:
Intangible assets	998	1,275
Accumulated amortization	$ 6,334	$ 6,324