Financing (Schedule of Interest Rate Swap) (Details) $ in Thousands	Oct. 20, 2016 USD ($)
Debt Disclosure [Abstract]
October 3, 2018	$ 225,000
October 3, 2019	180,000
October 3, 2020	125,000
April 3, 2021	$ 0

Derivative Instruments, Notional Amount on Interest Rate Swap, Period Three

No definition available.

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Namespace Prefix:	mtsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant