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Organization and Basis of Presentation (Details)	3 Months Ended
	Sep. 30, 2016 property	Sep. 27, 2016 USD ($)	Apr. 25, 2016 USD ($)	Jan. 31, 2010
Consolidated Entities [Line Items]
Number of gaming entertainment properties | property	22
Business Combination, Assets and Liabilities Arising from Contingencies, Amount Recognized, Net			$ 20,000,000
Subsidiary, Borgata
Consolidated Entities [Line Items]
Equity Method Investment, Ownership Percentage				50.00%
Aliante Gaming, LLC [Member]
Consolidated Entities [Line Items]
Business Combination, Assets and Liabilities Arising from Contingencies, Amount Recognized, Net		$ 372,300,000

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The net amount, measured at acquisition-date fair value, of all the assets acquired and liabilities assumed that arise from contingencies and were recognized by the entity.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(1)
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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
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