Employee Benefit Plans (Details)	1 Months Ended
Jan. 31, 2016 USD ($)
Employee Benefit Plans
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	50.00%
Defined Contribution Plan, First Match Threshold, Percentage	4.00%
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount	$ 1,000

Represents the maximum percentage that an employer will first match in contributing to the defined benefit plan.

No definition available.

Name:	eri_DefinedContributionPlanFirstMatchThresholdPercentage
Namespace Prefix:	eri_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration