Represents the useful life of barged-based facility.

No definition available.

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

- Definition

The amount of capital expenditures under the Company's construction program for the next fiscal year.

+ References

No definition available.

+ Details

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

- Definition

Represents the increase in annual rental expense.

+ References

No definition available.

+ Details

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

- Definition

Represents the initial term of lease.

+ References

No definition available.

+ Details

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

- Definition

Represents the number of lease renewal options.

+ References

No definition available.

+ Details

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

- Definition

Represents the term of lease renewal options.

+ References

No definition available.

+ Details

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

- Definition

Represents the percentage of annual escalator in fixed component of rent structure, if certain rent coverage ratio thresholds are met under the Master Lease.

+ References

No definition available.

+ Details

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

- Definition

Represents the adjustment to operating lease component expressed as a percentage of the average change to net revenues from assets under lease during the preceding five years.

+ References

No definition available.

+ Details

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

- Definition

Represents the adjustment to operating lease component expressed as a percentage of the average change to net revenues from assets under lease during the preceding month.

+ References

No definition available.

+ Details

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

- Definition

Represents the period over which operating lease component is adjusted.

+ References

No definition available.

+ Details

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

- Details

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

- Definition

Represents the percentage of real estate construction costs paid for by GLPI to facilities.

+ References

No definition available.

+ Details

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

- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

No definition available.

+ Details

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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

- Definition

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 55

-Paragraph 40

-Subparagraph (Note 3)

-URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697

+ Details

Name:	us-gaap_OperatingLeasesFutureMinimumPaymentsDue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

Name:	us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

Name:	us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

Name:	us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

Name:	us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

Name:	us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

Name:	us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

+ References

No definition available.

+ Details

Name:	us-gaap_PurchaseObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Minimum amount of purchase arrangement maturing in the next fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments.

+ References

No definition available.

+ Details

Name:	us-gaap_PurchaseObligationDueInNextTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 440

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	penn_OperatingLeasesByTypeAxis=penn_MasterLeaseAgreementAndArgosyCasinoSiouxCityMember
Namespace Prefix:
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- Details

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Commitments and Contingencies (Details) (USD $)	0 Months Ended	12 Months Ended		3 Months Ended				12 Months Ended	0 Months Ended
Commitments and Contingencies (Details) (USD $)	Nov. 01, 2013 Option	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2012	Nov. 01, 2014
Operating Leased Assets [Line Items]
Total rental expense		$ 421,388,000us-gaap_LeaseAndRentalExpense	$ 69,502,000us-gaap_LeaseAndRentalExpense
Number of lease renewal options	4penn_LeaseRenewalOptionsNumber
Term of lease renewal options	5 years
Future minimum lease commitments relating to the base lease rent portion of noncancelable operating leases
2015		397,266,000		397,266,000
2016		396,236,000		396,236,000
2017		395,284,000		395,284,000
2018		386,733,000		386,733,000
2019		344,729,000		344,729,000
Thereafter		3,047,430,000		3,047,430,000
Total		4,967,678,000		4,967,678,000
Capital Expenditure Commitments
Capital expenditures under current construction program for 2015		121,900,000		121,900,000
Contractual commitment to spend on capital expenditures		18,300,000		18,300,000
Purchase obligations
Obligations to purchase various goods and services		44,400,000us-gaap_PurchaseObligation		44,400,000us-gaap_PurchaseObligation
Obligations to be incurred in 2015		33,600,000		33,600,000
Master Lease Agreement
Operating Leased Assets [Line Items]
Total rental expense		421,400,000	69,500,000	107,800,000	104,600,000	104,600,000	104,300,000
Number of lease renewal options		4
Useful life of barged-based facility		80.00%
Term of lease renewal options		5 years
Initial term of lease	15 years	15 years
Future minimum lease commitments relating to the base lease rent portion of noncancelable operating leases
2015		392,701,000		392,701,000
2016		392,701,000		392,701,000
2017		392,701,000		392,701,000
2018		384,451,000		384,451,000
2019		343,200,000		343,200,000
Thereafter		3,031,599,000		3,031,599,000
Total		4,937,353,000		4,937,353,000
Master Lease Agreement \| Maximum
Operating Leased Assets [Line Items]
Number of lease renewal options		4
Master Lease Agreement \| Facilities Held Under Leases
Operating Leased Assets [Line Items]
Annual escalator in fixed component of rent structure, if certain rent coverage ratio thresholds are met (as a percent)		2.00%
Period over which operating lease component is adjusted	5 years	5 years
Adjustment to operating lease component as percentage of the average change to net revenues during preceding five years	4.00%	4.00%
Adjustment to operating lease component as percentage of the average change to net revenues during preceding month	20.00%
Increase In Annual Rental Expense		19,000,000
Real Estate Construction Costs Paid In Percentage		10.00%
Term of lease renewal options	5 years
Master Lease Agreement \| Hollywood Casinos in Columbus, Ohio and Toledo, Ohio
Operating Leased Assets [Line Items]
Adjustment to operating lease component as percentage of the average change to net revenues during preceding month		20.00%
Other Lease Agreements
Operating Leased Assets [Line Items]
Total rental expense		34,000,000	37,100,000					38,000,000
Future minimum lease commitments relating to the base lease rent portion of noncancelable operating leases
2015		4,565,000		4,565,000
2016		3,535,000		3,535,000
2017		2,583,000		2,583,000
2018		2,282,000		2,282,000
2019		1,529,000		1,529,000
Thereafter		15,831,000		15,831,000
Total		30,325,000		30,325,000
Master Lease Agreement And Argosy Casino Sioux City Member
Operating Leased Assets [Line Items]
Increase In Annual Rental Expense									$ 3,200,000