Represents the square footage of the clubhouse.

No definition available.

Name:	penn_BusinessAcquisitionAreaOfClubhouseOfAcquiredEntity
Namespace Prefix:	penn_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the square footage of the foot grandstand.

+ References

No definition available.

+ Details

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Namespace Prefix:	penn_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

For contingent consideration arrangements recognized in connection with a business combination, this element represents the period the first contingent purchase price consideration is due following the first four fiscal quarters of operation.

+ References

No definition available.

+ Details

Name:	penn_BusinessCombinationPeriodFirstPaymentOfContingentConsiderationDue
Namespace Prefix:	penn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

For contingent consideration arrangements recognized in connection with a business combination, this element represents period for calculation of contingent purchase price consideration based on the annual earnings.

+ References

No definition available.

+ Details

Name:	penn_BusinessCombinationPeriodForCalculationOfContingentConsiderationBasedOnAnnualEarnings
Namespace Prefix:	penn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of real estate acquired and amount of facility held for productive use including, but not limited to, office, production, storage and distribution facilities, acquired at the acquisition date.

+ References

No definition available.

+ Details

Name:	penn_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLandAndBuildings
Namespace Prefix:	penn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. It also includes the cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill.

+ References

No definition available.

+ Details

Name:	penn_PaymentsToAcquireBusinessesAndIntangibleAssetsNetOfCashAcquired
Namespace Prefix:	penn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Estimated value of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

+ References

No definition available.

+ Details

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

- Details

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

- Definition

Amount of liability recognized arising from contingent consideration in a business combination.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 25

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 35

-Paragraph 1

-Subparagraph b

-URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

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Balance Type:	debit
Period Type:	instant

Acquisitions (Details) (USD $)	9 Months Ended			0 Months Ended	9 Months Ended
Acquisitions (Details) (USD $)	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Mar. 28, 2014 Plainridge Park Casino Properties [Member]	Sep. 30, 2014 Plainridge Park Casino Properties [Member] item sqft	Sep. 30, 2014 Plainridge Racecourse [Member]
Acquisitions
Period contingent purchase price consideration is due following first four fiscal quarters						60 days
Period for calculation of contingent purchase price consideration based on the annual earnings						10 years
Fair value for contingent purchase price consideration						$ 18,500,000
Preliminary purchase price allocated to land and buildings						57,900,000
Preliminary purchase price allocated to goodwill	491,048,000		492,398,000			3,000,000
Estimated value of Casino					225,000,000
Number of slot machines					1,250
Size of foot grandstand (in square feet)					26,000
Size of foot clubhouse (in square feet)					13,000
Acquisition of businesses and gaming and other licenses	$ 118,678,000	$ 590,000		$ 25,000,000