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v2.4.1.9

Summary of Significant Accounting Policies (Details) (USD $) | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Revenue recognition |  |
Promotional allowances | $ 37,888,000 us-gaap_PromotionalAllowances | $ 36,931,000 us-gaap_PromotionalAllowances
Cost of complimentary services | 13,321,000 penn_CostOfComplimentaryServices | 13,510,000 penn_CostOfComplimentaryServices
Gaming and Racing Taxes |  |
Gaming expense | 227,000,000 penn_GamingExpense | 219,500,000 penn_GamingExpense
Rooms |  |
Revenue recognition |  |
Promotional allowances | 8,336,000 us-gaap_PromotionalAllowances / us-gaap_ProductOrServiceAxis = penn_RoomsMember | 8,071,000 us-gaap_PromotionalAllowances / us-gaap_ProductOrServiceAxis = penn_RoomsMember
Cost of complimentary services | 1,054,000 penn_CostOfComplimentaryServices / us-gaap_ProductOrServiceAxis = penn_RoomsMember | 1,013,000 penn_CostOfComplimentaryServices / us-gaap_ProductOrServiceAxis = penn_RoomsMember
Food and Beverage |  |
Revenue recognition |  |
Promotional allowances | 27,448,000 us-gaap_PromotionalAllowances / us-gaap_ProductOrServiceAxis = penn_FoodAndBeverageMember | 26,598,000 us-gaap_PromotionalAllowances / us-gaap_ProductOrServiceAxis = penn_FoodAndBeverageMember
Cost of complimentary services | 11,215,000 penn_CostOfComplimentaryServices / us-gaap_ProductOrServiceAxis = penn_FoodAndBeverageMember | 11,264,000 penn_CostOfComplimentaryServices / us-gaap_ProductOrServiceAxis = penn_FoodAndBeverageMember
Other |  |
Revenue recognition |  |
Promotional allowances | 2,104,000 us-gaap_PromotionalAllowances / us-gaap_ProductOrServiceAxis = penn_OtherServicesMember | 2,262,000 us-gaap_PromotionalAllowances / us-gaap_ProductOrServiceAxis = penn_OtherServicesMember
Cost of complimentary services | $ 1,052,000 penn_CostOfComplimentaryServices / us-gaap_ProductOrServiceAxis = penn_OtherServicesMember | $ 1,233,000 penn_CostOfComplimentaryServices / us-gaap_ProductOrServiceAxis = penn_OtherServicesMember

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- Definition Represents the estimated cost of providing complimentary services during the period. + References No definition available. + Details
Name: | penn_CostOfComplimentaryServices
Namespace Prefix: | penn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | penn_GamingAndRacingTaxesAbstract
Namespace Prefix: | penn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition This element represents gaming taxes, pari-mutuel taxes and purse expense. + References No definition available. + Details
Name: | penn_GamingExpense
Namespace Prefix: | penn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition This element represents the estimated retail value of accommodations, food and beverage, and other services furnished to guests without charge. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 605 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6472957&loc=d3e51325-107943 + Details
Name: | us-gaap_PromotionalAllowances
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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- Details
Name: | us-gaap_ProductOrServiceAxis=penn_FoodAndBeverageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProductOrServiceAxis=penn_OtherServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProductOrServiceAxis=penn_RoomsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |