XML 56 R41.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Variable Interest Entity (VIE) - Additional Information (Detail) |  | 3 Months Ended
--- | --- | ---
Jan. 02, 2007 company | Apr. 02, 2016 USD ($)
Variable Interest Entity [Abstract] |  |
Number of Companies with Rights to Intellectual Property | company | 2 |
Deconsolidation, Revaluation of Retained Investment, Gain (Loss), Amount | $ |  | $ 0.3

X
- Definition Number of Companies with Rights to Intellectual Property + References No definition available. + Details
Name: | masi_NumberofCompanieswithRightstoIntellectualProperty
Namespace Prefix: | masi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Variable Interest Entity [Abstract] + References No definition available. + Details
Name: | masi_VariableInterestEntityAbstract
Namespace Prefix: | masi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition In connection with deconsolidation of a subsidiary or derecognition of a group of assets, the portion of any gain (loss) recognized by the parent, during the period, which is related to the remeasurement of any retained investment in the former subsidiary or group of assets to its fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64809438&loc=SL4582445-111684 + Details
Name: | us-gaap_DeconsolidationRevaluationOfRetainedInvestmentGainOrLossAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration