Consolidating Condensed Financial Information - Consolidating Condensed Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues:
Net revenues	$ 663,181	$ 487,253	$ 1,936,125	$ 1,384,247
Operating expenses:
Marketing and promotions	33,292	23,122	97,673	66,255
General and administrative	122,767	75,599	360,086	223,546
Corporate	13,014	9,217	50,819	33,018
Impairment charges		3,787	958	13,602
Depreciation and amortization	52,592	35,760	166,882	99,204
Total operating expenses	524,033	396,220	1,582,972	1,155,318
Gain (loss) on sale or disposal of property and equipment	(284)	(110)	21,668	(393)
Proceeds from terminated sale		5,000		5,000
Transaction expenses	(12,442)	(4,091)	(21,628)	(10,043)
(Loss) income from unconsolidated affiliates	(1,515)	(63)	(2,132)	(116)
Operating (loss) income	124,907	91,769	351,061	223,377
OTHER EXPENSE:
Interest expense, net	(71,897)	(34,085)	(217,205)	(96,579)
Loss on early retirement of debt, net	(1,204)		(1,204)	(162)
Unrealized gain on restricted investments	3,318		460
Income before income taxes	55,124	57,684	133,112	126,636
Income tax benefit (provision)	(18,069)	(19,980)	(38,892)	(31,281)
Net income	37,055	37,704	94,220	95,355
Gaming and Pari-mutuel Commissions
Revenues:
Gross revenues	458,000
Net revenues		368,169	1,385,848	1,060,417
Operating expenses:
Operating expenses	202,555	180,062	616,101	519,558
Non-gaming
Revenues:
Gross revenues	205,181
Net revenues		119,084	550,277	323,830
Operating expenses:
Operating expenses	99,813	68,673	290,453	200,135
Reportable Legal Entities | Eldorado Resorts, Inc. (Parent Obligor)
Revenues:
Net revenues	1,785	10	4,966	10
Operating expenses:
Corporate	13,490	8,596	50,352	30,148
Management fee	(6,401)	(7,067)	(16,956)	(19,234)
Depreciation and amortization	1,311	923	3,701	2,646
Total operating expenses	8,400	2,452	37,097	13,560
Gain (loss) on sale or disposal of property and equipment			409
Proceeds from terminated sale		5,000		5,000
Transaction expenses	(12,442)	(4,090)	(20,470)	(9,543)
(Loss) income from unconsolidated affiliates	(1,552)		(2,281)
Operating (loss) income	(20,609)	(1,532)	(54,473)	(18,093)
OTHER EXPENSE:
Interest expense, net	(35,600)	(27,582)	(108,617)	(76,927)
Loss on early retirement of debt, net	(1,204)		(1,204)	(162)
Unrealized gain on restricted investments	3,318		460
Subsidiary income (loss)	71,256	61,964	203,531	166,040
Income before income taxes	17,161	32,850	39,697	70,858
Income tax benefit (provision)	19,894	4,854	54,523	24,497
Net income	37,055	37,704	94,220	95,355
Reportable Legal Entities | Guarantor Subsidiaries
Revenues:
Net revenues	659,870	476,536	1,921,625	1,352,866
Operating expenses:
Marketing and promotions	33,291	22,687	97,422	64,943
General and administrative	122,802	73,755	358,884	218,054
Corporate	(541)	94	166	751
Impairment charges			958	9,815
Management fee	6,401	7,067	16,956	19,234
Depreciation and amortization	51,225	34,782	163,125	96,180
Total operating expenses	515,546	381,033	1,540,501	1,110,831
Gain (loss) on sale or disposal of property and equipment	(284)	(101)	21,193	(386)
Transaction expenses		(1)	(913)	(500)
(Loss) income from unconsolidated affiliates	37	(63)	149	(116)
Operating (loss) income	144,077	95,338	401,553	241,033
OTHER EXPENSE:
Interest expense, net	(35,948)	(6,088)	(107,507)	(18,293)
Income before income taxes	108,129	89,250	294,046	222,740
Income tax benefit (provision)	(37,633)	(25,778)	(92,515)	(56,519)
Net income	70,496	63,472	201,531	166,221
Reportable Legal Entities | Non-Guarantor Subsidiaries
Revenues:
Net revenues	1,526	10,707	9,534	31,371
Operating expenses:
Marketing and promotions	1	435	251	1,312
General and administrative	(35)	1,844	1,202	5,492
Corporate	65	527	301	2,119
Impairment charges		3,787		3,787
Depreciation and amortization	56	55	56	378
Total operating expenses	87	12,735	5,374	30,927
Gain (loss) on sale or disposal of property and equipment		(9)	66	(7)
Transaction expenses			(245)
Operating (loss) income	1,439	(2,037)	3,981	437
OTHER EXPENSE:
Interest expense, net	(349)	(415)	(1,081)	(1,359)
Income before income taxes	1,090	(2,452)	2,900	(922)
Income tax benefit (provision)	(330)	944	(900)	741
Net income	760	(1,508)	2,000	(181)
Reportable Legal Entities | Gaming and Pari-mutuel Commissions | Guarantor Subsidiaries
Revenues:
Gross revenues	457,852
Net revenues		359,897	1,381,231	1,036,650
Operating expenses:
Operating expenses	202,555	174,602	612,937	503,741
Reportable Legal Entities | Gaming and Pari-mutuel Commissions | Non-Guarantor Subsidiaries
Revenues:
Gross revenues	148
Net revenues		8,272	4,617	23,767
Operating expenses:
Operating expenses		5,460	3,164	15,817
Reportable Legal Entities | Non-gaming | Eldorado Resorts, Inc. (Parent Obligor)
Revenues:
Gross revenues	1,785
Net revenues		10	4,966	10
Reportable Legal Entities | Non-gaming | Guarantor Subsidiaries
Revenues:
Gross revenues	202,018
Net revenues		116,639	540,394	316,216
Operating expenses:
Operating expenses	99,813	68,046	290,053	198,113
Reportable Legal Entities | Non-gaming | Non-Guarantor Subsidiaries
Revenues:
Gross revenues	1,378
Net revenues		2,435	4,917	7,604
Operating expenses:
Operating expenses		627	400	2,022
Consolidating and Eliminating Entries
OTHER EXPENSE:
Subsidiary income (loss)	(71,256)	(61,964)	(203,531)	(166,040)
Income before income taxes	(71,256)	(61,964)	(203,531)	(166,040)
Net income	$ (71,256)	$ (61,964)	$ (203,531)	$ (166,040)