Summary of Significant Accounting Policies - Jamul Tribe Financing (Details) - Jamul Tribe $ in Millions	Oct. 20, 2016 USD ($)
Credit Facilities
Jamul Tribe long-term financing
Credit facilities borrowing capacity	$ 460
Credit Facilities | Maximum
Jamul Tribe long-term financing
Senior secured net leverage ratio requirement	5.0
Revolving credit facility - Commercial banks
Jamul Tribe long-term financing
Credit facilities borrowing capacity	$ 5
Term Loan B Facility
Jamul Tribe long-term financing
Credit facilities borrowing capacity	340
Term Loan C Facility
Jamul Tribe long-term financing
Credit facilities borrowing capacity	98
Delayed Draw Term Loan C Facility Commitments
Jamul Tribe long-term financing
Credit facilities borrowing capacity	$ 15