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Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands, shares in Millions |  | 12 Months Ended
--- | --- | ---
Nov. 05, 2016 USD ($) | Dec. 29, 2018 USD ($) segment shares | Dec. 30, 2017 USD ($) shares | Dec. 31, 2016 USD ($) shares
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Depreciation |  | $ 16,300 | $ 15,200 | $ 13,000
Accumulated amortization |  | 27,234 | 24,675 |
Cost of patents, Gross |  | 5,300 | 4,300 |
Cost of trademarks, Gross |  | 500 | 600 |
Capitalized Software Development Costs for Software Sold to Customers |  | $ 700 | 200 | 0
Product life estimate |  | 7 years |  |
Capitalized Computer Software, Amortization |  | $ 2,000 | 1,900 | 1,800
Unamortized cost by company |  | $ 1,400 | 800 |
Number of Sources of Product Revenue | segment |  | 4 |  |
Royalty Revenue, Number of Days Royalty Revenue is Adjusted Subsequent to Quarter End |  | 60 days |  |
Other Recurring Income |  | $ 2,000 | 19,200 | 8,200
Advertising costs |  | $ 17,900 | $ 17,800 | $ 14,300
Options to purchase of shares of common stock | shares |  | 1.1 | 0.4 | 0.2
Number of reportable segments | segment |  | 1 |  |
Retained earnings |  | $ 931,073 | $ 737,956 |
Deferred Tax Assets, Net |  | 18,254 | 10,101 |
Prepaid income taxes |  | $ 3,071 | 3,494 |
As Previously Reported |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Retained earnings |  |  | 720,842 |
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Retained earnings |  |  | 17,114 |
Cumulative Effect of New Accounting Principle in Period of Adoption |  |  | 17,100 | $ 23,900
Patents |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Estimated life maximum |  | 10 years |  |
Accumulated amortization |  | $ 8,868 | 8,473 |
Weighted average number of years until the next renewal |  | 1 year |  |
Trademarks |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Estimated life maximum |  | 17 years |  |
Accumulated amortization |  | $ 1,889 | 1,611 |
Weighted average number of years until the next renewal |  | 5 years |  |
Patents and trademarks |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Accumulated amortization |  | $ 4,800 | 4,900 | $ 3,800
Total renewal costs capitalized |  | $ 500 | 600 |
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 |  |
Operating Lease, Right-of-Use Asset |  | $ 19,000 |  |
Retained Earnings, Cumulative Effect, Full Retrospective Method |  | $ 16,000 |  |
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 |  |
Operating Lease, Right-of-Use Asset |  | $ 24,000 |  |
Retained Earnings, Cumulative Effect, Full Retrospective Method |  | $ 26,000 |  |
Restricted Stock Units (RSUs) |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Weighted Average Number of Shares, Contingently Issuable | shares |  | 2.7 |  |
Masimo vs Philips N.V. [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Litigation Settlement, Amount (Deprecated 2017-01-31) | $ 300,000 |  |  |
Collaborative Arrangement, Rights and Obligations |  |  | 30,000 |
Air Transportation Equipment | Minimum |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property and equipment, useful life |  | 10 years |  |
Air Transportation Equipment | Maximum |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property and equipment, useful life |  | 20 years |  |
Buildings and Improvements | Minimum |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property and equipment, useful life |  | 7 years |  |
Buildings and Improvements | Maximum |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property and equipment, useful life |  | 15 years |  |
Machinery and equipment | Minimum |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property and equipment, useful life |  | 5 years |  |
Machinery and equipment | Maximum |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property and equipment, useful life |  | 10 years |  |
Computer equipment | Minimum |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property and equipment, useful life |  | 2 years |  |
Computer equipment | Maximum |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property and equipment, useful life |  | 6 years |  |
Furniture and Office Equipment | Minimum |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property and equipment, useful life |  | 2 years |  |
Furniture and Office Equipment | Maximum |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property and equipment, useful life |  | 6 years |  |
Accounting Standards Update 2016-16 [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Retained earnings |  |  | 400 |
Deferred Tax Assets, Net |  |  | 100 |
Prepaid income taxes |  |  | $ 500 |

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Name: | us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201616Member
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Data Type: | na
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