Percent of total assets at close of period.

No definition available.

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

- Definition

Represents the percentage of income from operations derived from the division.

+ References

No definition available.

+ Details

Name:	penn_IncomeFromOperationsPercentage
Namespace Prefix:	penn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- 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

- Definition

The percent of total net revenues of the entity represented by the segment or subsegment.

+ References

No definition available.

+ Details

Name:	penn_PercentOfNetRevenue
Namespace Prefix:	penn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

+ Details

Name:	us-gaap_OperatingIncomeLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis=penn_KansasEntertainmentLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=penn_PennInteractiveVenturesLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Summary of Significant Accounting Policies - Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Information
Impact to income from operations	$ 143,663	$ 139,300	$ 418,939	$ 429,168
Kansas Entertainment
Segment Information
Ownership interest in joint venture (as a percent)	50.00%		50.00%
Penn Interactive Ventures \| Maximum
Segment Information
Percent of net revenue			2.00%
Percent of income from operations			5.00%
Percent of total assets	2.00%		2.00%