Segment Information - Schedule of Capital Expenditures for Reportable Segments (Parenthetical) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting [Abstract]
Reimbursement of capital expenditures from West Virginia regulatory authorities	$ 361	$ 4,207	$ 1,266

Represents amount reimbursed towards capital expenditure.

No definition available.

Name:	eri_CapitalExpenditureReimbursedByRacingCommission
Namespace Prefix:	eri_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration