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Summary of Significant Accounting Policies - Additional Information (Detail) shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($) shares	Oct. 01, 2016 USD ($) shares	Sep. 30, 2017 USD ($) segment shares	Oct. 01, 2016 USD ($) shares
Summary Of Significant Accounting Policies [Line Items]
Number of Sources of Product Revenue | segment			4
Depreciation			$ 10,800,000	$ 9,500,000
Impairment of goodwill, intangible assets and other long-lived assets	$ 0	$ 0	$ 0	$ 0
Number of days royalty revenue is adjusted subsequent to quarter end			60 days
Options to purchase of shares of common stock | shares	200	100	600	1,400
Income taxes			$ 86,759,000	$ 25,753,000
Interest (net of amounts capitalized)			432,000	2,603,000
Unpaid purchases of property, plant and equipment			3,349,000	1,232,000
Unsettled common stock proceeds from option exercises			113,000	476,000
Unsettled stock repurchases			2,653,000	0
Patents
Summary Of Significant Accounting Policies [Line Items]
Finite-Lived Intangible Assets, Cost Incurred to Renew or Extend			$ 500,000	$ 400,000
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]
Warranty period for defects in material and workmanship			6 months
Maximum
Summary Of Significant Accounting Policies [Line Items]
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			7 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			33
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

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