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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 |

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