Acquisition and Preliminary Purchase Accounting (Details) $ in Thousands			3 Months Ended	6 Months Ended
	Nov. 24, 2015 USD ($)	Jul. 28, 1995 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Dec. 31, 2015 USD ($)
Purchase Consideration Calculation Abstract
Purchase consideration				$ 72,500
Estimated fair values of the assets acquired and liabilities assumed
Current and other assets			$ 23,740	23,740
Property and equipment			183,033	183,033
Goodwill			66,826	66,826	$ 66,826
Intangible assets			6,000	6,000
Other noncurrent assets			10,809	10,809
Net assets acquired			223,582	223,582
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	21,625
Property and equipment			168,037	168,037
Intangible assets			5,000	5,000
Other noncurrent assets			10,809	10,809
Net assets acquired			205,471	$ 205,471
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	$ 11,500
Silver Legacy Joint Venture | Short-term Debt
Estimated fair values of the assets acquired and liabilities assumed
Long-term debt			5,000	5,000
Silver Legacy Joint Venture | Long-term Debt
Estimated fair values of the assets acquired and liabilities assumed
Long-term debt			75,500	75,500
Circus Reno
Estimated fair values of the assets acquired and liabilities assumed
Current and other assets			2,115	2,115
Property and equipment			14,996	14,996
Intangible assets			1,000	1,000
Net assets acquired			18,111	18,111
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
Prepayment penalty (1)				1,831
Closing Silver Legacy and Circus Reno net working capital				8,235
Reverse member note (3)				(6,107)
Deferred tax liability				2,769
Purchase consideration				223,582
Decrease in property and equipment			$ 1,300
Estimated fair values of the assets acquired and liabilities assumed
Goodwill	$ 0
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
Prepayment penalty (1)				1,831
Closing Silver Legacy and Circus Reno net working capital				6,124
Reverse member note (3)				(6,107)
Deferred tax liability				2,769
Purchase consideration				205,471
Resorts | Circus Reno
Purchase Consideration Calculation Abstract
Cash consideration paid				16,000
Closing Silver Legacy and Circus Reno net working capital				2,111
Purchase consideration				$ 18,111
Galleon | Silver Legacy Joint Venture
Acquisition and purchase accounting
Ownership interest held by former members of subsidiary (as a percent)	50.00%
Loyalty program
Purchase Consideration Calculation Abstract
Amortization period				1 year