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Organization and Basis of Presentation (Details)	Mar. 31, 2015 jurisdiction facility
Organization and Basis of Presentation
Number of facilities the entity owned, managed, or had ownership interests in	26penn_NumberOfFacilities
Number of jurisdictions in which the entity operates	17penn_NumberOfJurisdictionsInWhichEntityOperates

X

- Definition

The number of facilities which the entity owns, manages or has an ownership interest in as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	penn_NumberOfFacilities
Namespace Prefix:	penn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The number of jurisdictions the entity operates in as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	penn_NumberOfJurisdictionsInWhichEntityOperates
Namespace Prefix:	penn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Details

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