Summary of Significant Accounting Policies (Details 6)	Sep. 30, 2014
Kansas Entertainment LLC [Member]
Segment Information
Ownership interest in joint venture (as a percent)	50.00%
Cordish
Segment Information
Ownership interest in joint venture (as a percent)	50.00%

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

No definition available.

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