v2.4.0.8

Pension Plans (Fair Value Of Plan Assets) (Details) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012
--- | --- | --- | ---
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | $ 157,350 |  | $ 138,193 | $ 124,833
U.S. Plan Assets Common Collective Trusts [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 112,859 |  |  |
International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 44,491 |  |  |
U.S. Treasury, Agency And Other Local Government And Non-Corporate [Member] | U.S. Plan Assets Common Collective Trusts [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 25,025 |  |  |
Corporate Investment Grade [Member] | U.S. Plan Assets Common Collective Trusts [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 87,538 |  |  |
Corporate High Yield [Member] | U.S. Plan Assets Common Collective Trusts [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 26 |  |  |
Government [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 4,910 |  |  |
Europe Corporate Investment Grade [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 7,769 |  |  |
Europe Large Capitalization Stocks [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 22,746 |  |  |
Insurance Company Funds [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 8,235 | [1] |  |
Cash [Member] | U.S. Plan Assets Common Collective Trusts [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 270 |  |  |
Cash [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 831 |  |  |
Level 1 [Member] | U.S. Plan Assets Common Collective Trusts [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 0 |  |  |
Level 1 [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 36,256 |  |  |
Level 1 [Member] | U.S. Treasury, Agency And Other Local Government And Non-Corporate [Member] | U.S. Plan Assets Common Collective Trusts [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 0 |  |  |
Level 1 [Member] | Corporate Investment Grade [Member] | U.S. Plan Assets Common Collective Trusts [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 0 |  |  |
Level 1 [Member] | Corporate High Yield [Member] | U.S. Plan Assets Common Collective Trusts [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 0 |  |  |
Level 1 [Member] | Government [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 4,910 |  |  |
Level 1 [Member] | Europe Corporate Investment Grade [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 7,769 |  |  |
Level 1 [Member] | Europe Large Capitalization Stocks [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 22,746 |  |  |
Level 1 [Member] | Insurance Company Funds [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 0 | [1] |  |
Level 1 [Member] | Cash [Member] | U.S. Plan Assets Common Collective Trusts [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 0 |  |  |
Level 1 [Member] | Cash [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 831 |  |  |
Level 2 [Member] | U.S. Plan Assets Common Collective Trusts [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 112,859 |  |  |
Level 2 [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 8,235 |  |  |
Level 2 [Member] | U.S. Treasury, Agency And Other Local Government And Non-Corporate [Member] | U.S. Plan Assets Common Collective Trusts [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 25,025 |  |  |
Level 2 [Member] | Corporate Investment Grade [Member] | U.S. Plan Assets Common Collective Trusts [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 87,538 |  |  |
Level 2 [Member] | Corporate High Yield [Member] | U.S. Plan Assets Common Collective Trusts [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 26 |  |  |
Level 2 [Member] | Government [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 0 |  |  |
Level 2 [Member] | Europe Corporate Investment Grade [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 0 |  |  |
Level 2 [Member] | Europe Large Capitalization Stocks [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 0 |  |  |
Level 2 [Member] | Insurance Company Funds [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 8,235 | [1] |  |
Level 2 [Member] | Cash [Member] | U.S. Plan Assets Common Collective Trusts [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 270 |  |  |
Level 2 [Member] | Cash [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 0 |  |  |
Level 3 [Member] | U.S. Plan Assets Common Collective Trusts [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 0 |  |  |
Level 3 [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 0 |  |  |
Level 3 [Member] | U.S. Treasury, Agency And Other Local Government And Non-Corporate [Member] | U.S. Plan Assets Common Collective Trusts [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 0 |  |  |
Level 3 [Member] | Corporate Investment Grade [Member] | U.S. Plan Assets Common Collective Trusts [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 0 |  |  |
Level 3 [Member] | Corporate High Yield [Member] | U.S. Plan Assets Common Collective Trusts [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 0 |  |  |
Level 3 [Member] | Government [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 0 |  |  |
Level 3 [Member] | Europe Corporate Investment Grade [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 0 |  |  |
Level 3 [Member] | Europe Large Capitalization Stocks [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 0 |  |  |
Level 3 [Member] | Insurance Company Funds [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 0 | [1] |  |
Level 3 [Member] | Cash [Member] | U.S. Plan Assets Common Collective Trusts [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | 0 |  |  |
Level 3 [Member] | Cash [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | $ 0 |  |  |
[1] | These investments are comprised primarily of funds invested with an insurance company in Japan with a guaranteed rate of return. The insurance company invests these assets primarily in government and corporate bonds.

X
- Details
Name: | pmtc_FairValueOfPlanAssetsLineItems
Namespace Prefix: | pmtc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=29635418&loc=d3e12355-114930 + Details
Name: | us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant