Spin-Off of Real Estate Assets through a Real Estate Investment Trust (Details) (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended	0 Months Ended
Sep. 30, 2014	Nov. 01, 2013 Master Lease Agreement [Member] Option	Nov. 01, 2013 Master Lease Agreement [Member]
Spin-Off of Real Estate Assets through a Real Estate Investment Trust
Number of shares of common stock that were issued to the holders of common stock and Series C convertible preferred stock		1
Number of shares of Series C preferred stock entitled by one share of common stock on the record date			0.001
Initial term of Master Lease		15 years
Number of lease renewal options		4
Term of lease renewal options		5 years
Decrease to shareholders' equity	$ (482)

Represents the number of lease renewal options.

No definition available.

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- Definition

Represents the number of shares of common stock that were issued to the holders of common stock and series C convertible preferred stock holders upon satisfaction or waiver of conditions to the spin-off.

+ References

No definition available.

+ Details

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Namespace Prefix:	penn_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of shares of Series C preferred stock, entitled by one share of common stock on the record date.

+ References

No definition available.

+ Details

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Namespace Prefix:	penn_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Term of the lessee's leasing arrangement renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_LesseeLeasingArrangementsOperatingLeasesRenewalTerm
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Balance Type:	na
Period Type:	duration

- Definition

Term of the lessee's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

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Data Type:	xbrli:stringItemType
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- Definition

The change in equity as a result of a spin-off transaction (a regular or reverse spin-off) which is based on the recorded amounts.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Spinoff

-URI http://asc.fasb.org/extlink&oid=6749415

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 60

-Section 25

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6406278&loc=d3e26268-112671

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Reverse Spinoff

-URI http://asc.fasb.org/extlink&oid=6524171

+ Details

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Balance Type:	credit
Period Type:	duration