Annual report pursuant to Section 13 and 15(d)

Property And Equipment (Details)

v3.3.1.900
Property And Equipment (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 02, 2016
Jan. 03, 2015
Dec. 28, 2013
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 119,608 $ 113,832  
Less accumulated depreciation and amortization 71,030 64,372  
Property and equipment, net 48,578 49,460  
Property and equipment, net 87,982 71,164  
Depreciation $ 9,034 8,414 $ 8,152
Buildings [Member]      
Property, Plant and Equipment [Line Items]      
Useful life 39 years 6 months    
Property and equipment, gross $ 38,242 38,920  
Laboratory And Production Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 27,027 24,864  
Sound And Video Library [Member]      
Property, Plant and Equipment [Line Items]      
Useful life 5 years    
Property and equipment, gross $ 600 600  
Computer Equipment And Software [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 34,497 30,842  
Furniture And Fixtures [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 5,214 5,354  
Automobiles [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 385 327  
Leasehold Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 11,591 10,857  
Land Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Useful life 15 years    
Property and equipment, gross $ 2,052 2,068  
Land [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, net 6,360 6,843  
Deposits And Projects In Process [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, net $ 33,043 $ 14,861  
Minimum [Member] | Laboratory And Production Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Useful life 5 years    
Minimum [Member] | Computer Equipment And Software [Member]      
Property, Plant and Equipment [Line Items]      
Useful life 3 years    
Minimum [Member] | Furniture And Fixtures [Member]      
Property, Plant and Equipment [Line Items]      
Useful life 3 years    
Minimum [Member] | Automobiles [Member]      
Property, Plant and Equipment [Line Items]      
Useful life 3 years    
Minimum [Member] | Leasehold Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Useful life 3 years    
Maximum [Member] | Laboratory And Production Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Useful life 7 years    
Maximum [Member] | Computer Equipment And Software [Member]      
Property, Plant and Equipment [Line Items]      
Useful life 5 years    
Maximum [Member] | Furniture And Fixtures [Member]      
Property, Plant and Equipment [Line Items]      
Useful life 5 years    
Maximum [Member] | Automobiles [Member]      
Property, Plant and Equipment [Line Items]      
Useful life 5 years    
Maximum [Member] | Leasehold Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Useful life 5 years