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Commitments and Contingencies - Additional Information (Detail)
 3 Months Ended 12 Months Ended
Jul. 20, 2016
USD ($)
Nov. 04, 2015
USD ($)
Jan. 03, 2014
USD ($)
Apr. 01, 2017
USD ($)
ft²
distributor
Agreement
Apr. 02, 2016
USD ($)
Dec. 31, 2016
USD ($)
distributor
Jan. 31, 2014
participant
Contingencies And Commitments [Line Items]              
Property Plant and Equipment, Occupied Square Feet | ft²       16,830      
Accrued rent expense       $ 1,400,000   $ 700,000  
Rental expense related to operating leases       1,700,000 $ 1,400,000    
Capital Leases, Future Minimum Payments, Interest Included in Payments       $ 100,000      
Company contribution percentage based on employee contribution of up to 3% of employee's compensation       3.00%      
Severance plan participation agreements | Agreement       7      
Supplemental Unemployment Benefits, Severance Benefits, Required Notice of Resignation       6 months      
Purchase Commitment, Remaining Minimum Amount Committed       $ 74,000,000      
Other Commitment       200,000      
Bank balances       343,800,000      
Bank balance covered by Federal Deposit Insurance Corporation limit       3,500,000      
Royalty       $ 8,205,000 $ 7,877,000    
Number of participants in the surfactant, positive pressure, and oxygenation randomized trial | participant             2
Percentage Of Revenue One Customer       13.80% 16.00%    
Percentage Of Revenue Two Customer       12.10% 11.20%    
Number of days royalty revenue is adjusted subsequent to quarter end       60 days      
Contractual Obligation       $ 27,792,000      
Sales [Member]              
Contingencies And Commitments [Line Items]              
Concentration Risk, Just-in-time Distributors       2 2    
Accounts Receivable [Member]              
Contingencies And Commitments [Line Items]              
Concentration Risk, Just-in-time Distributors | distributor       2   2  
Sales Revenue, Product Line [Member]              
Contingencies And Commitments [Line Items]              
Revenue Customer Concentration       $ 99,700,000 $ 91,900,000    
Just in time distributor one [Member]              
Contingencies And Commitments [Line Items]              
Percentage Of Accounts Receivable Balance From Two Just In Time Distributor       8.00%   7.50%  
Just in time distributor two [Member]              
Contingencies And Commitments [Line Items]              
Percentage Of Accounts Receivable Balance From Two Just In Time Distributor       10.70%   5.60%  
Masimo vs Former Physician Office Sales Representatives              
Contingencies And Commitments [Line Items]              
Litigation Settlement, Expense $ 2,600,000            
Masimo vs. Physicians Healthsource, Inc.              
Contingencies And Commitments [Line Items]              
Loss contingency, damages sought     $ 500        
Employment Contracts [Member]              
Contingencies And Commitments [Line Items]              
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award   2.7          
Employment Agreement, Severance Terms   $ 35,000,000          
Employment Agreement, Severance Terms   10.00%          
Employment Agreement, Severance Benefits, Special Payment, Qualifying Termination       $ 146,900,000      
International              
Contingencies And Commitments [Line Items]              
Company's contribution to employee retirement savings plan       100,000      
United States              
Contingencies And Commitments [Line Items]              
Company's contribution to employee retirement savings plan       $ 600,000 $ 500,000