Restructuring (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 28, 2014
Restructuring Reserve [Roll Forward]
Restructuring Reserve	$ 456
Restructuring Charges	1,962
Payments for Restructuring	(2,418)
Restructuring Reserve	0
Cost of net revenue
Restructuring Reserve [Roll Forward]
Restructuring Charges	55
Research and development
Restructuring Reserve [Roll Forward]
Restructuring Charges	1,106
Selling, general and administrative
Restructuring Reserve [Roll Forward]
Restructuring Charges	801
Employee termination benefits
Restructuring Reserve [Roll Forward]
Restructuring Reserve	418
Restructuring Charges	1,416
Payments for Restructuring	(1,834)
Restructuring Reserve	0
Lease and other contract termination costs
Restructuring Reserve [Roll Forward]
Restructuring Reserve	38
Restructuring Charges	209
Payments for Restructuring	(247)
Restructuring Reserve	0
Loss on disposal of property and equipment
Restructuring Reserve [Roll Forward]
Restructuring Reserve	0
Restructuring Charges	337
Payments for Restructuring	(337)
Restructuring Reserve	$ 0