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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- 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 period 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 terms of service by an employee to be considered for inclusion in the 401k plan.

+ References

No definition available.

+ Details

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- Definition

MTR Gaming Plans.

+ References

No definition available.

+ Details

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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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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

Scioto Dows.

+ References

No definition available.

+ Details

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- Definition

Fair value of assets that have been segregated and restricted to provide pension or postretirement benefits. Assets include, but are not limited to, stocks, bonds, other investments, earnings from investments, and contributions by the employer and employees.

+ 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=64937038&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=65897934&loc=d3e1928-114920

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Plan Assets
-URI http://asc.fasb.org/extlink&oid=6749337

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Plan Assets
-URI http://asc.fasb.org/extlink&oid=6520858

+ Details

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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=65897934&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=64852052&loc=d3e1703-114919

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Balance Type:	debit
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- 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=49170846&loc=d3e28014-114942

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Balance Type:	debit
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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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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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)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of cash or cash equivalents contributed by the entity to fund its pension plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3536-108585

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Employee Benefit Plans - Additional Information (Details) - USD ($)		12 Months Ended
	Jan. 01, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined contribution plan, first match threshold, percentage	4.00%
Defined contribution plan, maximum annual contributions per employee, amount	$ 1,000
Matching Contributions		$ 1,500,000
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	1000 hours
Eldorado Shreveport
Defined contribution plan, first match threshold, percentage			6.00%
Mountaineer
Matching Contributions		1,200,000	$ 1,300,000	$ 400,000
Scioto Downs
Scioto Downs
Fair value of plan assets		1,100,000
Fair value of benefit obligations		800,000
Funded status of plan		300,000
Cash contributions to pension plan		$ 0	$ 0
Resorts
Defined contribution plan, first match threshold, percentage			4.00%
Matching Contributions			$ 500,000	400,000
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			1000 hours
MTR Gaming
Matching Contributions			$ 100,000	$ 100,000
MTR Gaming 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
Minimum
Defined contribution plan, contributions per employee, percent	1.00%
Minimum \| Resorts
Defined contribution plan, contributions per employee, percent			1.00%
Maximum
Defined contribution plan, contributions per employee, percent	100.00%
Defined contribution plan, employer matching contribution, percent of match	50.00%
Maximum \| Eldorado Shreveport
Defined contribution plan, employer matching contribution, percent of match			50.00%
Maximum \| Resorts
Defined contribution plan, contributions per employee, percent			100.00%
Defined contribution plan, employer matching contribution, percent of match			25.00%