Basis of Presentation (Details) (USD $)	3 Months Ended
Mar. 31, 2015	Dec. 31, 2014
Equity Method Investments	$ 16,773,000us-gaap_EquityMethodInvestments	$ 18,180,000us-gaap_EquityMethodInvestments
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	20,000,000
Other Affiliates [Member]
Ownership percentage in joint venture	50.00%
Smaller Casino Properties [Member]
Ownership percentage in joint venture	50.00%
Number of Investments	3
MPM Enterprises, LLC [Member]
Ownership percentage, parent	50.00%
MPM Enterprises, LLC [Member] \| Intangible Assets [Member]
Assets consolidated from variable interest entity	29,400,000	31,900,000
MPM Enterprises, LLC [Member] \| Receivables [Member]
Assets consolidated from variable interest entity	3,600,000	3,200,000
Variable Interest Entity, Not Primary Beneficiary [Member]
Equity Method Investments	$ 7,600,000	$ 8,800,000
Major Hotel/Casino Properties [Member] \| Wholly Owned Properties [Member]
Casino properties	9
Smaller Casino Properties [Member]
Casino properties	10
Smaller Casino Properties [Member] \| Partially Owned Properties [Member]
Casino properties	3
Ownership percentage, parent	50.00%

Number of Investments

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

+ Details

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- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.12)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33749-111570

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

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- Definition

Represents the quantification of the effect of adopting the new accounting standard or change in accounting principle expected by the entity to have a significant effect on the entity's financial statements.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 605

-SubTopic 25

-Section 65

-Paragraph 1

-Subparagraph (c)(4)

-URI http://asc.fasb.org/extlink&oid=19771798&loc=SL6749767-165964

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- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

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- Definition

The carrying amount of the consolidated Variable Interest Entity's assets included in the reporting entity's statement of financial position.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (bb)

-URI http://asc.fasb.org/extlink&oid=28200181&loc=d3e5710-111685

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