Represents the number of acres of land the acquired facility is situated on.

Name:	penn_BusinessAcquisitionAcreageOfAcquiredEntity
Namespace Prefix:	penn
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the square footage of the clubhouse building at the acquired raceway.

+ Details

Name:	penn_BusinessAcquisitionAreaOfClubhouseBuildingOfAcquiredEntity
Namespace Prefix:	penn
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the area of the food events at the acquired resort.

+ Details

Name:	penn_BusinessAcquisitionAreaOffFoodEventsOfAcquiredEntity
Namespace Prefix:	penn
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the area of the gaming space at the acquired resort.

+ Details

Name:	penn_BusinessAcquisitionAreaOfGamingSpaceOfAcquiredEntity
Namespace Prefix:	penn
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the square footage of the grandstand building at the acquired raceway.

+ Details

Name:	penn_BusinessAcquisitionAreaOfGrandstandBuildingOfAcquiredEntity
Namespace Prefix:	penn
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the length of the oval track length at the acquired raceway.

+ Details

Name:	penn_BusinessAcquisitionLengthOfOvalTrackOfFacilityOfAcquiredEntity
Namespace Prefix:	penn
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the minimum area of the meeting and conference space at the acquired resort.

+ Details

Name:	penn_BusinessAcquisitionMinimumAreaOfMeetingAndConferenceSpaceOfAcquiredEntity
Namespace Prefix:	penn
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of destination bars at the acquired resort.

+ Details

Name:	penn_BusinessAcquisitionNumberOfDestinationBarsOfAcquiredEntity
Namespace Prefix:	penn
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of stories in the clubhouse building at the acquired raceway.

+ Details

Name:	penn_BusinessAcquisitionNumberOfFloorsOfClubhouseBuildingOfAcquiredEntity
Namespace Prefix:	penn
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the number of guest rooms and suites at the acquired resort.

+ Details

Name:	penn_BusinessAcquisitionNumberOfGuestRoomsAndSuitesOfAcquiredEntity
Namespace Prefix:	penn
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the location of an acquired entity in number of miles from a specified location.

+ Details

Name:	penn_BusinessAcquisitionNumberOfMilesOfAcquiredEntityFromASpecifiedLocation
Namespace Prefix:	penn
Data Type:	num:lengthItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the number of parking facility, a spa and fitness center at the acquired resort.

+ Details

Name:	penn_BusinessAcquisitionNumberOfParkingFacilitySpaAndFitnessCenterOfAcquiredEntity
Namespace Prefix:	penn
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of race paddocks at the acquired raceway.

+ Details

Name:	penn_BusinessAcquisitionNumberOfRacePaddock
Namespace Prefix:	penn
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the number of restaurants at the acquired resort.

+ Details

Name:	penn_BusinessAcquisitionNumberOfRestaurantsOfAcquiredEntity
Namespace Prefix:	penn
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of ownership interest in joint venture sold to the incoming partner.

+ Details

Name:	penn_JointVentureOwnershipPercentageSold
Namespace Prefix:	penn
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

+ References

+ Details

Name:	us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePrice
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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.

+ Details

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

- Definition

The amount of acquisition cost of a business combination allocated to current assets.

+ References

+ Details

Name:	us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentAssets
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of acquisition cost of a business combination allocated to current liabilities of the acquired entity.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph e

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 37

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 98-1

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentLiabilities
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of acquisition cost of a business combination allocated to noncurrent assets of the acquired entity, except for property plant and equipment, intangible assets, and goodwill.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph e

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 98-1

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 37

-Subparagraph f

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_BusinessAcquisitionPurchasePriceAllocationOtherNoncurrentAssets
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of acquisition cost of a business combination allocated to property, plant and equipment to be used in ongoing operations.

+ References

+ Details

Name:	us-gaap_BusinessAcquisitionPurchasePriceAllocationPropertyPlantAndEquipment
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Acquisition and Other Recent Business Ventures (Details) (USD $) In Millions, unless otherwise specified		1 Months Ended
	Jul. 31, 2011	Mar. 31, 2009 M Resort count sqft acre mi	Jun. 02, 2011 M Resort	Dec. 31, 2010 M Resort	Feb. 28, 2011 Rosecroft Raceway mi count sqft acre
Acquisition
Purchase price of the acquired entity			$ 230.5
Purchase price allocated to loan receivable within total other assets			2.4	230.5
Purchase price allocated to property and equipment, net			203.7
Purchase price allocated to total current assets			13.7
Purchase price allocated to total current liabilities			$ 17.3
Location of facility in distance from major metropolitan area (in miles)		10			13
Size of property where facility is located (in acres)		90			125
Area of gaming space at resort (in square feet)		92,000
Number of guest rooms and suites at resort (in counts)		390
Number of restaurants at resort (in counts)		9
Number of destination bars at resort (in counts)		5
Minimum area of meeting and conference space at resort (in square feet)		60,000
Number of parking facility, a spa and fitness center at resort		4,700
Joint venture interest in Maryland Jockey Club sold (as a percent)	49.00%
Area of food events piazza at resort (in square feet)		100,000
Length of oval track at raceway (in miles)					5/8-mile
Number of race paddocks at raceway					7
Size of grandstand building at raceway (in square feet)					53,000
Size of clubhouse building at raceway (in square feet)					96,000
Number of stories in clubhouse building at raceway (in counts)					3