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Summary of Significant Accounting Policies (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Concentration of Credit Risk    
Receivables $ 41,618,000us-gaap_AccountsReceivableNetCurrent $ 52,538,000us-gaap_AccountsReceivableNetCurrent
Amount of tax obligations that will be reimbursed by GLPI 6,500,000us-gaap_RelatedPartyTransactionDueFromToRelatedParty  
Casino Rama    
Concentration of Credit Risk    
Receivables   10,300,000us-gaap_AccountsReceivableNetCurrent
/ us-gaap_SubsegmentsAxis
= penn_CasinoRamaServicesIncMember
Accounts Receivable | Hollywood Casino at Charles Town Races    
Concentration of Credit Risk    
Receivables 4,600,000us-gaap_AccountsReceivableNetCurrent
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_SubsegmentsAxis
= penn_HollywoodCasinoCharlesTownRacesMember		 4,800,000us-gaap_AccountsReceivableNetCurrent
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_SubsegmentsAxis
= penn_HollywoodCasinoCharlesTownRacesMember
Accounts Receivable | Casino Rama    
Concentration of Credit Risk    
Receivables 6,800,000us-gaap_AccountsReceivableNetCurrent
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_SubsegmentsAxis
= penn_CasinoRamaServicesIncMember		  
Accounts Receivable | Hollywood Casino at Penn National Race Course    
Concentration of Credit Risk    
Receivables 2,900,000us-gaap_AccountsReceivableNetCurrent
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_SubsegmentsAxis
= penn_HollywoodCasinoAtPennNationalRaceCourseMember		 2,500,000us-gaap_AccountsReceivableNetCurrent
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_SubsegmentsAxis
= penn_HollywoodCasinoAtPennNationalRaceCourseMember
Accounts Receivable | Kansas    
Concentration of Credit Risk    
Receivables 2,900,000us-gaap_AccountsReceivableNetCurrent
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_SubsegmentsAxis
= penn_KansasEntertainmentLLCMember		 3,300,000us-gaap_AccountsReceivableNetCurrent
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_SubsegmentsAxis
= penn_KansasEntertainmentLLCMember
Accounts Receivable | Approved casino customers    
Concentration of Credit Risk    
Markers issued to customers $ 4,900,000penn_ConcentrationRiskAmount
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember		 $ 4,300,000penn_ConcentrationRiskAmount
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember