Annual report pursuant to Section 13 and 15(d)

Property And Equipment (Details)

v3.6.0.2
Property And Equipment (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Jan. 02, 2016
Jan. 03, 2015
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 163,677 $ 119,608  
Less accumulated depreciation and amortization 75,792 71,030  
Property and equipment, net 87,885 48,578  
Property and equipment, net 101,267 87,982  
Depreciation $ 11,878 9,034 $ 8,414
Buildings [Member]      
Property, Plant and Equipment [Line Items]      
Useful life 39 years 6 months    
Property and equipment, gross $ 70,719 38,242  
Laboratory And Production Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 29,697 27,027  
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 41,801 34,497  
Furniture And Fixtures [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 6,164 5,214  
Automobiles [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 369 385  
Leasehold Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 11,701 11,591  
Land Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Useful life 15 years    
Property and equipment, gross $ 2,626 2,052  
Land [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, net 6,286 6,361  
Deposits And Projects In Process [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, net $ 7,096 $ 33,043  
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