Organization and Basis of Presentation (Details)	Jun. 30, 2011
Organization and Basis of Presentation
Number of facilities the entity owns, manages, or has ownership interests in	26
Number of jurisdictions in which the entity operates	18
Maximum ownership interest in unconsolidated affiliates to be accounted for under the equity method (as a percent)	50.00%

Name:

penn_MaximumPercentageOfOwnershipInterestsInUnconsolidatedAffiliatesToBeAccountedUnderEquityMethod

Namespace Prefix:

penn

Data Type:

num:percentItemType

Balance Type:

na

Period Type:

instant