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Summary of Significant Accounting Policies (Details 3) - Master Lease Agreement | 12 Months Ended
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Dec. 31, 2015
Capital Leased Assets |
Discount rate | 9.70%
Lease term | 35 years

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- Definition Stated interest rate of the capital lease. + References No definition available. + Details
Name: | penn_CapitalLeasesInterestRate
Namespace Prefix: | penn_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Term of the lessee's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | penn_LesseeLeasingArrangementsCapitalLeasesTermOfContract
Namespace Prefix: | penn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_CapitalLeasedAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | penn_CapitalLeasesByTypeAxis=penn_MasterLeaseAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |