Summary of Significant Accounting Policies (Details 3) - Definitive Agreement with Jamul Indian Village $ in Millions	Apr. 05, 2013 USD ($) ft² a item	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)
Long-term asset related to the Jamul Tribe
Land owned | a	6
Proposed facility development cost	$ 390.0
Number of stories | item	3
Size of gaming and entertainment facility | ft²	200,000
Number of slot machines | item	1,700
Number of table games | item	43
Number of parking spaces | item	1,800
Loan commitment		$ 400.0
Anticipated loan funding		390.0
Note receivable		108.1	$ 62.0
Interest Receivable		$ 7.2	$ 3.3