Condensed Consolidating Financial Information Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues:
Gross revenues													$ 784,541	$ 410,272	$ 290,253
Less promotional allowances	$ (17,680)	$ (15,996)	$ (15,723)	$ (15,358)	$ (15,841)	$ (11,579)	$ (10,976)	$ (10,053)	$ (10,284)	$ (11,319)	$ (11,036)	$ (10,428)	(64,757)	(48,449)	(43,067)
Net operating revenues	203,840	199,536	198,356	182,809	179,936	90,528	72,725	67,083	65,832	74,950	76,864	72,607	719,784	361,823	247,186
Operating expenses:
Marketing and promotions													31,227	21,982	17,740
General and administrative													96,870	58,738	43,713
Depreciation and amortization													56,921	28,643	17,031
Total operating expenses	171,464	161,610	160,430	154,766	156,755	72,943	56,054	53,726	54,528	57,283	57,301	55,448	648,270	339,478	224,560
Loss on disposal of assets													6	84	226
Acquisition charges													(2,452)	(7,411)	(3,173)
Equity in income of unconsolidated affiliates													3,460	2,705	3,355
Operating (loss) income	$ 13,281	$ 24,092	$ 23,059	$ 12,084	$ 6,450	$ 2,778	$ 6,775	$ 1,552	$ 1,035	$ 7,092	$ 10,500	$ 6,025	72,516	17,555	22,582
Interest expense, net													61,558	30,734	15,665
Gain on valuation of unconsolidated affiliate													(35,582)
Loss on early retirement of debt													(1,937)	(90)
Net (loss) income before income taxes													44,603	(12,554)	18,897
Provision for income taxes													69,580	(1,768)	0
NET INCOME (LOSS) ATTRIBUTABLE TO ERI, INC.													114,183	$ (14,425)	$ 18,897
Eldorado Resorts, Inc. (Parent Obligor)
Operating expenses:
General and administrative													13,738
Depreciation and amortization													369
Total operating expenses													14,107
Acquisition charges													(2,368)
Operating (loss) income													(16,475)
Interest expense, net													10,613
Loss on early retirement of debt													(1,855)
Net (loss) income before income taxes													(28,943)
NET INCOME (LOSS) ATTRIBUTABLE TO ERI, INC.													(28,943)
Consolidating and Eliminating Entries
Operating expenses:
General and administrative													(13,760)
Total operating expenses													(13,760)
Operating (loss) income													13,760
Net (loss) income before income taxes													13,760
Provision for income taxes													67,019
NET INCOME (LOSS) ATTRIBUTABLE TO ERI, INC.													80,779
Eldorado Resorts, Inc. Consolidated
Revenues:
Gaming and pari-mutuel comissions													623,258
Non-gaming													161,283
Gross revenues													784,541
Less promotional allowances													(64,757)
Net operating revenues													719,784
Operating expenses:
Gaming and pari-mutuel commissions													367,545
Non-gaming													79,238
Marketing and promotions													31,227
General and administrative													113,339
Depreciation and amortization													56,921
Total operating expenses													648,270
Loss on disposal of assets													6
Acquisition charges													(2,452)
Equity in income of unconsolidated affiliates													3,460
Operating (loss) income													72,516
Interest expense, net													61,558
Gain on valuation of unconsolidated affiliate													(35,582)
Loss on early retirement of debt													(1,937)
Net (loss) income before income taxes													44,603
Provision for income taxes													69,580
NET INCOME (LOSS) ATTRIBUTABLE TO ERI, INC.													114,183
Guarantor Subsidiaries
Revenues:
Gaming and pari-mutuel comissions													612,229
Non-gaming													147,894
Gross revenues													760,123
Less promotional allowances													(62,113)
Net operating revenues													698,010
Operating expenses:
Gaming and pari-mutuel commissions													362,011
Non-gaming													71,966
Marketing and promotions													30,100
General and administrative													109,808
Depreciation and amortization													54,893
Total operating expenses													628,778
Loss on disposal of assets													6
Acquisition charges													(84)
Equity in income of unconsolidated affiliates													3,460
Operating (loss) income													72,602
Interest expense, net													49,409
Gain on valuation of unconsolidated affiliate													(35,582)
Loss on early retirement of debt													(82)
Net (loss) income before income taxes													58,693
Provision for income taxes													2,561
NET INCOME (LOSS) ATTRIBUTABLE TO ERI, INC.													61,254
Non-Guarantor Subsidiaries
Revenues:
Gaming and pari-mutuel comissions													11,029
Non-gaming													13,389
Gross revenues													24,418
Less promotional allowances													(2,644)
Net operating revenues													21,774
Operating expenses:
Gaming and pari-mutuel commissions													5,534
Non-gaming													7,272
Marketing and promotions													1,127
General and administrative													3,553
Depreciation and amortization													1,659
Total operating expenses													19,145
Operating (loss) income													2,629
Interest expense, net													1,536
Net (loss) income before income taxes													1,093
NET INCOME (LOSS) ATTRIBUTABLE TO ERI, INC.													$ 1,093