Derivative Instruments and Hedging Activities (Net Gains (Losses) Recognized in Income for Derivative Contracts) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Dec. 27, 2014	Dec. 28, 2013
Derivative Instruments and Hedging Activities [Abstract]
Net gain (loss) recognized in Other income (expense), net	$ 338	$ (140)

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