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Stock-Based Compensation (Details) (USD $) | 12 Months Ended | 0 Months Ended
--- | --- | ---
Dec. 31, 2014 item | Dec. 31, 2013 | Dec. 31, 2012 | Jun. 01, 2003 | Jun. 09, 2011
Gaming and Leisure Properties Inc |  |  |  |  |
Stock-based compensation |  |  |  |  |
Number of awards converted | 2 penn_NumberOfAwardsConverted / dei_LegalEntityAxis = penn_GamingAndLeisurePropertiesIncMember |  |  |  |
Employee stock options |  |  |  |  |
Stock-based compensation |  |  |  |  |
Exercise price of options granted, low end of range (in dollars per share) | 4.39 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |  |  |
Exercise price of options granted, high end of range (in dollars per share) | 14.41 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |  |  |
Number of Option Shares |  |  |  |  |
Outstanding at the beginning of the period (in shares) | 7,316,713 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |  |  |
Granted (in shares) | 916,522 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |  |  |
Exercised (in shares) | 1,468,863 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |  |  |
Canceled (in shares) | (130,750)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |  |  |
Outstanding at the end of the period (in shares) | 6,633,622 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember | 7,316,713 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |  |
Weighted-Average Exercise Price |  |  |  |  |
Outstanding at the beginning of the period (in dollars per share) | 7.51 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |  |  |
Granted (in dollars per share) | 11.61 us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |  |  |
Exercised (in dollars per share) | 7.18 us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |  |  |
Canceled (in dollars per share) | 11.97 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |  |  |
Outstanding at the end of the period (in dollars per share) | 8.12 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember | $ 7.51 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |  |
Additional disclosures |  |  |  |  |
Weighted-Average Remaining Contractual Term | 3 years 22 days |  |  |  |
Aggregate Intrinsic Value (in dollars) | 36,612,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |  |  |
Weighted-average grant-date fair value of options granted (in dollars per share) | 4.95 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  | $ 17.19 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |
Aggregate intrinsic value of stock options exercised (in dollars) | 8,200,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember | 46,000,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember | 23,200,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |
Number of Option Shares | 4,875,757 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |  |  |
Weighted-Average Exercise Price (in dollars per share) | 7.37 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |  |  |
Weighted-average remaining contractual term | 2 years 4 months 10 days |  |  |  |
Aggregate intrinsic value (in dollars) | 30,600,000 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |  |  |
Employee stock options | Minimum |  |  |  |  |
Stock-based compensation |  |  |  |  |
Contractual lives of options granted | 5 years |  |  |  |
Employee stock options | Maximum |  |  |  |  |
Stock-based compensation |  |  |  |  |
Contractual lives of options granted | 10 years |  |  |  |
2003 Plan |  |  |  |  |
Stock-based compensation |  |  |  |  |
Number of shares of common stock available for awards |  |  |  | 12,000,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = penn_LongTermIncentiveCompensationPlan2003Member |
2003 Plan | Incentive stock options |  |  |  |  |
Stock-based compensation |  |  |  |  |
Exercise price per share as a percentage of the fair market value of the Common Stock |  |  |  | 100.00%penn_ShareBasedCompensationArrangementByShareBasedPaymentAwardExercisePricePerShareAsPercentageOfFairMarketValueOfCommonStock / us-gaap_AwardTypeAxis = penn_IncentiveStockOptionsMember / us-gaap_PlanNameAxis = penn_LongTermIncentiveCompensationPlan2003Member |
2003 Plan | Nonqualified stock options |  |  |  |  |
Stock-based compensation |  |  |  |  |
Exercise price per share as a percentage of the fair market value of the Common Stock |  |  |  | 85.00%penn_ShareBasedCompensationArrangementByShareBasedPaymentAwardExercisePricePerShareAsPercentageOfFairMarketValueOfCommonStock / us-gaap_AwardTypeAxis = penn_NonqualifiedStockOptionsMember / us-gaap_PlanNameAxis = penn_LongTermIncentiveCompensationPlan2003Member |
2008 Plan |  |  |  |  |
Stock-based compensation |  |  |  |  |
Number of shares of common stock available for awards |  |  |  |  | 9,250,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = penn_LongTermIncentiveCompensationPlan2008Member
Increase in number of shares of common stock available for awards |  |  |  |  | 2,350,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized / us-gaap_PlanNameAxis = penn_LongTermIncentiveCompensationPlan2008Member
Options available for future grants (in shares) | 7,262,415 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = penn_LongTermIncentiveCompensationPlan2008Member |  |  |  |
2008 Plan | Employee stock options |  |  |  |  |
Stock-based compensation |  |  |  |  |
Number of shares of common stock counted against the maximum shares available for grant for each share awarded under the plan |  |  |  |  | 1 penn_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForIssuanceForEachShareGranted / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = penn_LongTermIncentiveCompensationPlan2008Member
2008 Plan | Stock appreciation rights (SARs) |  |  |  |  |
Stock-based compensation |  |  |  |  |
Number of shares of common stock counted against the maximum shares available for grant for each share awarded under the plan |  |  |  |  | 1 penn_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForIssuanceForEachShareGranted / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember / us-gaap_PlanNameAxis = penn_LongTermIncentiveCompensationPlan2008Member
2008 Plan | Restricted stock and Other full value stock awards |  |  |  |  |
Stock-based compensation |  |  |  |  |
Number of shares of common stock counted against the maximum shares available for grant for each share awarded under the plan |  |  |  |  | 2.44 penn_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForIssuanceForEachShareGranted / us-gaap_AwardTypeAxis = penn_RestrictedStockAndOtherFullValueStockAwardsMember / us-gaap_PlanNameAxis = penn_LongTermIncentiveCompensationPlan2008Member

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