Represents the amount of anticipated loan funding related to facility development.

No definition available.

Name:	penn_AnticipatedLoanFunding
Namespace Prefix:	penn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Minimum amount of loan commitment in which the entity has agreed to expend funds to borrower.

+ References

No definition available.

+ Details

Name:	penn_LoanCommitment
Namespace Prefix:	penn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the number of parking spaces available.

+ References

No definition available.

+ Details

Name:	penn_NumberOfParkingSpacesStructure
Namespace Prefix:	penn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of slot machines in the casino.

+ References

No definition available.

+ Details

Name:	penn_NumberOfSlotMachines
Namespace Prefix:	penn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of stories in the facility.

+ References

No definition available.

+ Details

Name:	penn_NumberOfStories
Namespace Prefix:	penn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of table games in the casino.

+ References

No definition available.

+ Details

Name:	penn_NumberOfTableGames
Namespace Prefix:	penn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the amount of proposed facility development cost.

+ References

No definition available.

+ Details

Name:	penn_ProposedFacilityDevelopmentCost
Namespace Prefix:	penn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	penn_SignificantAccountingPoliciesLineItems
Namespace Prefix:	penn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Carrying amount as of the balance sheet date, net of allowance for doubtful accounts, of account and note receivables due from other than related parties.

+ References

+ Details

Name:	us-gaap_AccountsAndNotesReceivableNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Area of land held.

+ References

No definition available.

+ Details

Name:	us-gaap_AreaOfLand
Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

Name:	us-gaap_AreaOfRealEstateProperty
Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.8)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 8

-Article 5

+ Details

Name:	us-gaap_InterestReceivable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Summary of Significant Accounting Policies (Details 3) (Jamul Tribe, USD $) In Millions, unless otherwise specified	0 Months Ended
	Apr. 05, 2013 item acre sqft	Mar. 31, 2015	Dec. 31, 2014	Apr. 05, 2013 acre sqft
Jamul Tribe
Long-term asset related to the Jamul Tribe
Land owned	6			6
Proposed facility development cost	$ 360
Number of stories	3
Size of gaming and entertainment facility	200,000			200,000
Number of slot machines	1,700
Number of table games	43
Number of parking spaces	1,800
Loan commitment		400
Anticipated loan funding		360
Note receivable		86.4	62.0
Interest Receivable		$ 5.0	$ 3.3