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Summary of Significant Accounting Policies (Details 6) (Kansas)	Mar. 31, 2014
Kansas
Segment Information
Ownership interest in joint venture (as a percent)	50.00%

X

- Definition

Represents the entity's ownership interest in a joint venture.

+ References

No definition available.

+ Details

Name:	penn_JointVentureOwnershipInterestPercentage
Namespace Prefix:	penn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration