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Summary of Significant Accounting Policies (Details 2) (USD $) In Thousands, unless otherwise specified | 0 Months Ended | 3 Months Ended
--- | --- | ---
Nov. 01, 2013 facility | Mar. 31, 2014
Rental expense related to the master lease |  |
Total rental expense |  | $ 104,309
Master Lease |  |
Rental expense related to the master lease |  |
Number of lease renewal options | 4 |
Term of lease renewal options | 5 years |
Initial term of Master Lease | 15 years |
Master Lease | Facilities under the Master Lease |  |
Rental expense related to the master lease |  |
Number of real property assets associated with Company's gaming and related facilities | 17 |
Percentage of escalation to fixed components of rent if certain rent coverage ratio thresholds are met | 2.00% |
Period over which operating lease component is adjusted | 5 years |
Adjustment to operating lease component as percentage of the average change to net revenues during preceding five years | 4.00% |
Adjustment to operating lease component as percentage of the average change to net revenues during preceding month | 20.00% |
Total rental expense |  | $ 104,300

X
- Definition Represents the number of lease renewal options. + References No definition available. + Details
Name: | penn_LeaseRenewalOptionsNumber
Namespace Prefix: | penn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of real estate property assets associated with gaming and related facilities under leases. + References No definition available. + Details
Name: | penn_NumberOfRealEstatePropertyAssetsAssociatedWithGamingAndRelatedFacilitiesUnderLeases
Namespace Prefix: | penn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the adjustment to operating lease component expressed as a percentage of the average change to net revenues from assets under lease during the preceding five years. + References No definition available. + Details
Name: | penn_OperatingLeaseComponentAdjustmentAsPercentageOfAverageChangeToNetRevenuesDuringPrecedingFiveYears
Namespace Prefix: | penn_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the adjustment to operating lease component expressed as a percentage of the average change to net revenues from assets under lease during the preceding month. + References No definition available. + Details
Name: | penn_OperatingLeaseComponentAdjustmentAsPercentageOfAverageChangeToNetRevenuesDuringPrecedingMonth
Namespace Prefix: | penn_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of escalation to fixed components of lease if certain rent coverage ratio thresholds are met. + References No definition available. + Details
Name: | penn_OperatingLeasesPercentageOfEscalationIfCertainRentCoverageRatioThresholdsAreMet
Namespace Prefix: | penn_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the period over which operating lease component is adjusted. + References No definition available. + Details
Name: | penn_PeriodOverWhichOperatingLeaseComponentAdjusted
Namespace Prefix: | penn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- 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: | us-gaap_LesseeLeasingArrangementsOperatingLeasesTermOfContract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_OperatingLeasedAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration