refers to age limit for employees to be considered eligible to participate in the 401k plan.

No definition available.

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- Definition

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

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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Period Type:	duration

- Definition

Represents the amount of excess Net Terminal Income used as a threshold for calculation of contribution to the plan.

+ References

No definition available.

+ Details

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

- Definition

refers to completed hours of service by an employee to be considered for inclusion in the 401k plan

+ References

No definition available.

+ Details

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- Definition

refers to completed months of service by an employee to be considered for inclusion in the 401k plan

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

n/a

+ References

No definition available.

+ Details

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Namespace Prefix:	eri_
Data Type:	xbrli:stringItemType
Balance Type:	na
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- Definition

Represents the percentage of net win from gaming operations which is the basis of employer contribution to a defined contribution plan.

+ References

No definition available.

+ Details

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

- Definition

Represents the percentage of the race track and simulcast wagering handles which is the basis of employer contribution to a defined contribution plan.

+ References

No definition available.

+ Details

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

- Definition

n/a

+ References

No definition available.

+ Details

Name:	eri_ResortsPlans
Namespace Prefix:	eri_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

n/a

+ References

No definition available.

+ Details

Name:	eri_SciotoDows
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The difference between fair value of plan assets at the end of the period and the fair value at the beginning of the period, adjusted for contributions and payments of benefits during the period, and after adjusting for taxes and other expenses, as applicable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Actual Return on Plan Assets (Component of Net Periodic Postretirement Benefit Cost)
-URI http://asc.fasb.org/extlink&oid=6504192

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Actual Return on Plan Assets (Component of Net Periodic Pension Cost)
-URI http://asc.fasb.org/extlink&oid=6504226

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 30
-Section 35
-Paragraph 50
-URI http://asc.fasb.org/extlink&oid=29635418&loc=d3e12355-114930

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=21915240&loc=d3e1703-114919

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage employer matches of the employee's percentage contribution matched.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum amount the employee may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value of obligations measured on a recurring basis.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a),(b)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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Namespace Prefix:
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- Details

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- Details

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Namespace Prefix:
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- Details

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Namespace Prefix:
Data Type:	na
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- Details

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- Details

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Employee Benefit Plans (Details) - USD ($)			3 Months Ended		12 Months Ended
Employee Benefit Plans (Details) - USD ($)	Jan. 01, 2016	Sep. 30, 2014	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	4.00%
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount	$ 1,000
Resorts
Defined Contribution Plan, Employer Matching Contribution, Percent of Match					25.00%
Matching Contributions					$ 500,000	$ 400,000	$ 200,000
Defined Contribution Plan, First Match Threshold, Percentage					4.00%
Resorts Plans
Age limit for inclusion in 401k plan					21 years
Limit of months of completed service for inclusion in 401k plan					6 months
Limit of hours of completed service for inclusion in 401k plan					1,000
Resorts \| Minimum
Defined Contribution Plan, Contributions Per Employee, Percent					1.00%
Resorts \| Maximum
Defined Contribution Plan, Contributions Per Employee, Percent					100.00%
MTR Gaming
Matching Contributions					$ 100,000	$ 100,000
MTR Gamings Plans
Race track and simulcast wagering handles - Percent						0.25%
Net win from gaming operations - Percent						1.00%
Excess Net Terminal Income threshold						$ 160,000,000
Mountaineer
Matching Contributions			$ 400,000
Eldorado Shreveport
Defined Contribution Plan, Employer Matching Contribution, Percent of Match					50.00%
Defined Contribution Plan, First Match Threshold, Percentage					6.00%
Scioto Downs
MTR Gamings Plans
Pension Income		$ 39,000		$ 39,000
Scioto Downs
Fair Value of Plan Assets					$ 1,100,000
Fair value of Benefit Obligations					900,000
Funded Status of Plan					$ 300,000