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Summary of Significant Accounting Policies - Additional Information (Detail)
shares in Thousands
 3 Months Ended
Mar. 31, 2018
USD ($)
segment
shares
Apr. 01, 2017
USD ($)
shares
Dec. 30, 2017
USD ($)
Dec. 31, 2016
USD ($)
Summary Of Significant Accounting Policies [Line Items]        
Number of Sources of Product Revenue | segment 4      
Impairment of goodwill, intangible assets and other long-lived assets $ 0 $ 0    
Number of days royalty revenue is adjusted subsequent to quarter end 60 days      
Options to purchase of shares of common stock | shares 900 100    
Retained earnings $ 783,159,000   $ 737,955,000  
Deferred Tax Assets, Net     19,981,000  
Prepaid Taxes 620,000   3,493,000  
Royalty 8,100,000 $ 8,200,000    
Patents        
Summary Of Significant Accounting Policies [Line Items]        
Finite-Lived Intangible Assets, Cost Incurred to Renew or Extend $ 100,000 $ 200,000    
Weighted average number of years until the next renewal 1 year      
Trademarks        
Summary Of Significant Accounting Policies [Line Items]        
Weighted average number of years until the next renewal 6 years      
Minimum        
Summary Of Significant Accounting Policies [Line Items]        
Revenue, remaining performance obligation, expected timing of satisfaction, period 3 years      
Warranty period for defects in material and workmanship 6 months      
Maximum        
Summary Of Significant Accounting Policies [Line Items]        
Revenue, remaining performance obligation, expected timing of satisfaction, period 6 years      
Warranty period for defects in material and workmanship 48 months      
Buildings        
Summary Of Significant Accounting Policies [Line Items]        
Property, Plant and Equipment, Useful Life 39 years      
Land, Buildings and Improvements | Minimum        
Summary Of Significant Accounting Policies [Line Items]        
Property, Plant and Equipment, Useful Life 7 years      
Land, Buildings and Improvements | Maximum        
Summary Of Significant Accounting Policies [Line Items]        
Property, Plant and Equipment, Useful Life 15 years      
Computer equipment | Minimum        
Summary Of Significant Accounting Policies [Line Items]        
Property, Plant and Equipment, Useful Life 2 years      
Computer equipment | Maximum        
Summary Of Significant Accounting Policies [Line Items]        
Property, Plant and Equipment, Useful Life 6 years      
Vehicles        
Summary Of Significant Accounting Policies [Line Items]        
Property, Plant and Equipment, Useful Life 5 years      
Tooling        
Summary Of Significant Accounting Policies [Line Items]        
Property, Plant and Equipment, Useful Life 3 years      
Furniture and Office Equipment | Minimum        
Summary Of Significant Accounting Policies [Line Items]        
Property, Plant and Equipment, Useful Life 2 years      
Furniture and Office Equipment | Maximum        
Summary Of Significant Accounting Policies [Line Items]        
Property, Plant and Equipment, Useful Life 6 years      
Demonstration units        
Summary Of Significant Accounting Policies [Line Items]        
Property, Plant and Equipment, Useful Life 3 years      
Machinery and equipment | Minimum        
Summary Of Significant Accounting Policies [Line Items]        
Property, Plant and Equipment, Useful Life 5 years      
Machinery and equipment | Maximum        
Summary Of Significant Accounting Policies [Line Items]        
Property, Plant and Equipment, Useful Life 10 years      
Aircraft | Minimum        
Summary Of Significant Accounting Policies [Line Items]        
Property, Plant and Equipment, Useful Life 10 years      
Aircraft | Maximum        
Summary Of Significant Accounting Policies [Line Items]        
Property, Plant and Equipment, Useful Life 20 years      
Restricted Stock Units (RSUs) [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | shares 0      
Restricted Stock Units (RSUs) [Member] | Chief Executive Officer [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | shares 2,700 2,700    
Accounting Standards Update 2016-16        
Summary Of Significant Accounting Policies [Line Items]        
Retained earnings $ 400,000      
Deferred Tax Assets, Net 100,000      
Prepaid Taxes $ 500,000      
Adjustments        
Summary Of Significant Accounting Policies [Line Items]        
Retained earnings     17,113,000  
Deferred Tax Assets, Net     3,917,000  
Cumulative effect adjustment     17,100,000 $ 23,900,000
Calculated under Revenue Guidance in Effect before Topic 606 [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Retained earnings     720,842,000  
Deferred Tax Assets, Net     $ 23,898,000