Derivative Instruments and Hedging Activities (Net Gains (Losses) Recognized in Income for Derivative Contracts) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Apr. 02, 2016	Mar. 28, 2015	Apr. 02, 2016	Mar. 28, 2015
Derivative Instruments and Hedging Activities [Abstract]
Net (loss) gain recognized in other (expense) income, net	$ (743)	$ 535	$ (834)	$ 873

The amount of net gains or losses on a cash flow hedge reclassified in the period to other (expense) income from accumulated other comprehensive income.

No definition available.

Name:	mtsc_CashFlowHedgeGainLossReclassifiedNetLossGainRecognizedInOtherExpenseIncomeNet
Namespace Prefix:	mtsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration