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Property and Equipment - Additional Information (Detail)
$ in Thousands
 12 Months Ended
Jan. 26, 2016
ft²
Jan. 02, 2016
USD ($)
ft²
Jan. 03, 2015
USD ($)
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Number of Square Feet Purchased | ft²   90,000  
Property, Plant and Equipment, Gross   $ 197,938 $ 159,036
Property, Plant and Equipment, Additions   $ 8,500  
Property Plant and Equipment, Occupied Square Feet | ft²   108,000  
Property, Plant and Equipment, Transfers and Changes   $ 41,700  
Accumulated amortization   65,472 57,084
Land      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross   23,738 22,894
Property, Plant and Equipment, Additions   700  
Building and improvements      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross   78,877 30,678
Property, Plant and Equipment, Additions   5,700  
Capital lease obligations      
Property, Plant and Equipment [Line Items]      
Furniture and office equipment, gross   400 600
Accumulated amortization   300 400
Research and Development Headquarters, Irvine, California [Member]      
Property, Plant and Equipment [Line Items]      
Interest Costs Capitalized   400 600
CALIFORNIA | Construction in Progress [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross   4,000 20,300
CALIFORNIA | Accounts Payable [Member] | Construction in Progress [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross   $ 4,200 $ 10,000
Lease Agreements [Member]      
Property, Plant and Equipment [Line Items]      
Property Plant and Equipment, Occupied Square Feet | ft² 70,700