v2.4.1.9

Derivative Financial Instruments (Notional Amounts Of Outstanding Forward Contracts) (Details) (Forward Contracts, USD $) In Thousands, unless otherwise specified	Jan. 03, 2015	Sep. 30, 2014
Notional amounts	$ 68,782invest_DerivativeNotionalAmount	$ 116,988invest_DerivativeNotionalAmount
Canadian Dollar / U.S. Dollar
Notional amounts	22,476invest_DerivativeNotionalAmount / us-gaap_CurrencyAxis = currency_CAD / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeForwardMember	25,583invest_DerivativeNotionalAmount / us-gaap_CurrencyAxis = currency_CAD / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeForwardMember
Euro / U.S. Dollar
Notional amounts	22,114invest_DerivativeNotionalAmount / us-gaap_CurrencyAxis = currency_EUR / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeForwardMember	61,751invest_DerivativeNotionalAmount / us-gaap_CurrencyAxis = currency_EUR / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeForwardMember
British Pound / Euro
Notional amounts	11,004invest_DerivativeNotionalAmount / us-gaap_CurrencyAxis = currency_GBP / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeForwardMember	14,259invest_DerivativeNotionalAmount / us-gaap_CurrencyAxis = currency_GBP / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeForwardMember
Israeli New Sheqel / U.S. Dollar
Notional amounts	1,730invest_DerivativeNotionalAmount / us-gaap_CurrencyAxis = currency_ILS / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeForwardMember	6,144invest_DerivativeNotionalAmount / us-gaap_CurrencyAxis = currency_ILS / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeForwardMember
All other
Notional amounts	$ 11,458invest_DerivativeNotionalAmount / us-gaap_CurrencyAxis = pmtc_AllOtherMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeForwardMember	$ 9,251invest_DerivativeNotionalAmount / us-gaap_CurrencyAxis = pmtc_AllOtherMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeForwardMember

X

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

+ Details

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Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Details

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Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CurrencyAxis=currency_EUR
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CurrencyAxis=currency_GBP
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CurrencyAxis=currency_ILS
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CurrencyAxis=pmtc_AllOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: