SUBSEQUENT EVENT - Additional Information (Detail) (Acquisition, USD $) In Millions, unless otherwise specified	Jan. 31, 2012
Acquisition
Subsequent Event [Line Items]
Business acquisition expected to be paid in cash	$ 44.0

Business Acquisition, Cost of Acquired Entity, Cash To Be Paid

No definition available.

Name:	mscc_BusinessAcquisitionCostOfAcquiredEntityCashToBePaid
Namespace Prefix:	mscc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant