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Summary of Significant Accounting Policies - Long-term Asset Related to Jamul Tribe (Details) - Tribe $ in Millions | Apr. 05, 2013 USD ($) a ft² item | Jun. 30, 2016 USD ($) | Dec. 31, 2015 USD ($)
--- | --- | --- | ---
Long-term asset related to the Jamul Tribe |  |  |
Land owned (in acres) | a | 6 |  |
Proposed facility development cost | $ 390.0 |  |
Number of stories at facility | item | 3 |  |
Size of gaming floor at and entertainment facility (in square feet) | ft² | 200,000 |  |
Number of slot machines at facility | item | 1,700 |  |
Number of table games at facility | item | 43 |  |
Number of parking spaces | item | 1,800 |  |
Anticipated loan funding |  | $ 390.0 |
Senior Loans, includes accrued interest |  | 299.1 | $ 197.7
Interest accrued |  | 25.3 | $ 13.9
Maximum |  |  |
Long-term asset related to the Jamul Tribe |  |  |
Loan commitment |  | $ 400.0 |

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