Acquisition and Preliminary Purchase Accounting (Details) $ in Thousands			3 Months Ended
	Nov. 24, 2015	Jul. 28, 1995 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Purchase Consideration Calculation Abstract
Closing Silver Legacy and Circus Reno net working capital			$ 8,000
Purchase consideration			72,500
Estimated fair values of the assets acquired and liabilities assumed
Current and other assets			23,740
Property and equipment			184,345
Goodwill			66,826	$ 66,826
Intangible assets			6,000
Other noncurrent assets			10,809
Net assets acquired			224,894
Silver Legacy Joint Venture
Purchase Consideration Calculation Abstract
Purchase consideration		$ 3,600
Estimated fair values of the assets acquired and liabilities assumed
Current and other assets			21,625
Property and equipment			169,544
Intangible assets			5,000
Other noncurrent assets			10,809
Net assets acquired			$ 206,978
Silver Legacy Joint Venture | Member notes
Purchase Consideration Calculation Abstract
Percentage of debt assumed			50
Estimated fair values of the assets acquired and liabilities assumed
Long-term debt			$ 11,500
Silver Legacy Joint Venture | Short-term Debt
Estimated fair values of the assets acquired and liabilities assumed
Long-term debt			5,000
Silver Legacy Joint Venture | Long-term Debt
Estimated fair values of the assets acquired and liabilities assumed
Long-term debt			75,500
Circus Reno
Estimated fair values of the assets acquired and liabilities assumed
Current and other assets			2,115
Property and equipment			14,801
Intangible assets			1,000
Net assets acquired			17,916
Resorts
Purchase Consideration Calculation Abstract
Cash consideration paid			72,500
Fair value of ERI’s preexisting 50% equity interest			56,500
Settlement of Silver Legacy’s long term debt (1)			87,854
Closing Silver Legacy and Circus Reno net working capital			8,040
Purchase consideration			224,894
Resorts | Silver Legacy Joint Venture
Purchase Consideration Calculation Abstract
Cash consideration paid			56,500
Fair value of ERI’s preexisting 50% equity interest			56,500
Settlement of Silver Legacy’s long term debt (1)			87,854
Closing Silver Legacy and Circus Reno net working capital			6,124
Purchase consideration			206,978
Resorts | Circus Reno
Purchase Consideration Calculation Abstract
Cash consideration paid			16,000
Closing Silver Legacy and Circus Reno net working capital			1,916
Purchase consideration			$ 17,916
Galleon | Silver Legacy Joint Venture
Acquisition and purchase accounting
Ownership interest held by former members of subsidiary (as a percent)	50.00%