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Summary of Significant Accounting Policies (Details 2) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2014 item | Dec. 31, 2013 | Dec. 31, 2012
Goodwill and Other Intangible Assets |  |  |
Goodwill | $ 277,582 us-gaap_Goodwill | $ 492,398 us-gaap_Goodwill | $ 1,380,689 us-gaap_Goodwill
Other intangible assets | $ 370,562 us-gaap_IntangibleAssetsNetExcludingGoodwill | $ 359,648 us-gaap_IntangibleAssetsNetExcludingGoodwill |
Goodwill as a percentage of total assets | 12.40%penn_GoodwillAsPercentageOfTotalAssets |  |
Other intangible assets as a percentage of total assets | 16.60%penn_IntangibleAssetsNetExcludingGoodwillAsPercentageOfTotalAssets |  |
Number of issues that arise with respect to assets that require significant management estimates and judgment | 2 penn_GoodwillAndIntangibleAssetsNumberOfIssuesThatRequireSignificantManagementEstimatesAndJudgment |  |
Land Improvements |  |  |
Estimated useful lives of property and equipment |  |  |
Useful lives | 15 years |  |
Building and Building Improvements | Minimum |  |  |
Estimated useful lives of property and equipment |  |  |
Useful lives | 5 years |  |
Building and Building Improvements | Maximum |  |  |
Estimated useful lives of property and equipment |  |  |
Useful lives | 31 years |  |
Furniture, Fixtures and Equipment | Minimum |  |  |
Estimated useful lives of property and equipment |  |  |
Useful lives | 3 years |  |
Furniture, Fixtures and Equipment | Maximum |  |  |
Estimated useful lives of property and equipment |  |  |
Useful lives | 31 years |  |

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- 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 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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