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Organization and Basis of Presentation (Details) | 6 Months Ended
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Jun. 30, 2017 jurisdiction facility item
Number of facilities the entity owned, managed, or had ownership interests in | facility | 29
Number of jurisdictions in which the entity operates | jurisdiction | 17
Prairie State Gaming |
Number of video gaming terminal route operators acquired | item | 2

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
- Definition The number of video gaming terminal route operators acquired. + References No definition available. + Details
Name: | penn_NumberOfVideoGamingTerminalRouteOperatorsAcquired
Namespace Prefix: | penn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=penn_PrairieStateGamingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |