Acquired Intangible Assets (Calculation Of Acquired Intangibles By Asset Class) (Details) - USD ($) $ in Thousands	3 Months Ended
Sep. 30, 2015	Jun. 30, 2015
Finite-Lived Intangible Assets, Net [Abstract]
Cost	$ 1,084,688	$ 1,145,249
Accumulated Amortization	(452,897)	(465,770)
Total	631,791	679,479
Technology Assets [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Cost	385,363	428,724
Accumulated Amortization	(187,384)	(210,862)
Total	197,979	217,862
Reduction of fully amortized intangible assets	$ 43,400
Weighted-average amortization period (in years) for acquired intangible assets	5 years
Customer Assets [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Cost	$ 699,325	716,525
Accumulated Amortization	(265,513)	(254,908)
Total	433,812	$ 461,617
Reduction of fully amortized intangible assets	$ 17,200
Weighted-average amortization period (in years) for acquired intangible assets	6 years

Reduction of Fully Amortized Finite-Lived Intangible Assets

No definition available.

Name:	otex_ReductionofFullyAmortizedFiniteLivedIntangibleAssets
Namespace Prefix:	otex_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275

+ Details

Name:	us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsNetAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=otex_TechnologyAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=otex_CustomerAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: