Consolidating Condensed Financial Information - Consolidating Condensed Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues:
Net revenues	$ 487,253	$ 472,878	$ 1,384,247	$ 1,050,897
Operating expenses:
Marketing and promotions	23,122	26,439	66,255	58,099
General and administrative	75,599	75,650	223,546	168,339
Corporate	9,217	7,718	33,018	21,734
Impairment charges	3,787		13,602
Depreciation and amortization	35,760	29,122	99,204	69,635
Total operating expenses	396,220	389,273	1,155,318	896,316
(Loss) gain on sale of asset or disposal of property and equipment	(110)	4	(393)	(51)
Proceeds from terminated sale	5,000		5,000
Transaction expenses	(4,091)	(2,094)	(10,043)	(89,172)
Equity in loss of unconsolidated affiliate	(63)	(23)	(116)	(305)
Operating (loss) income	91,769	81,492	223,377	65,053
Interest expense, net	(34,085)	(29,183)	(96,579)	(69,380)
Loss on early retirement of debt, net		(10,030)	(162)	(37,347)
Net income (loss) before income taxes	57,684	42,279	126,636	(41,674)
Income tax benefit (provision)	(19,980)	(12,592)	(31,281)	26,116
Net income (loss)	37,704	29,687	95,355	(15,558)
Gaming and Pari-mutuel Commissions
Revenues:
Net revenues	368,169	352,648	1,060,417	774,543
Operating expenses:
Operating expenses	180,062	173,979	519,558	398,904
Non-gaming
Revenues:
Net revenues	119,084	120,230	323,830	276,354
Operating expenses:
Operating expenses	68,673	76,365	200,135	179,605
Reportable Legal Entities | Eldorado Resorts, Inc. (Parent Obligor)
Revenues:
Net revenues	10		10
Operating expenses:
Corporate	8,596	7,865	30,148	21,413
Management fee	(7,067)	(7,666)	(19,234)	(21,214)
Depreciation and amortization	923	303	2,646	635
Total operating expenses	2,452	502	13,560	834
(Loss) gain on sale of asset or disposal of property and equipment				(21)
Proceeds from terminated sale	5,000		5,000
Transaction expenses	(4,090)	(455)	(9,543)	(69,628)
Operating (loss) income	(1,532)	(957)	(18,093)	(70,483)
Interest expense, net	(26,482)	(22,583)	(75,827)	(49,576)
Loss on early retirement of debt, net		(10,030)	(162)	(37,347)
Subsidiary income (loss)	60,864	51,738	164,940	77,393
Net income (loss) before income taxes	32,850	18,168	70,858	(80,013)
Income tax benefit (provision)	4,854	11,519	24,497	64,455
Net income (loss)	37,704	29,687	95,355	(15,558)
Reportable Legal Entities | Guarantor Subsidiaries
Revenues:
Net revenues	476,536	461,172	1,352,866	1,031,548
Operating expenses:
Marketing and promotions	22,687	25,623	64,943	56,641
General and administrative	73,755	73,840	218,054	165,279
Corporate	94	(1,464)	751	(1,791)
Impairment charges			9,815
Management fee	7,067	7,366	19,234	20,714
Depreciation and amortization	34,782	28,675	96,180	68,767
Total operating expenses	381,033	377,587	1,110,831	876,828
(Loss) gain on sale of asset or disposal of property and equipment	(101)	4	(386)	(30)
Transaction expenses	(1)	(1,639)	(500)	(19,544)
Equity in loss of unconsolidated affiliate	(63)	(23)	(116)	(305)
Operating (loss) income	95,338	81,927	241,033	134,841
Interest expense, net	(6,088)	(6,184)	(18,293)	(19,110)
Net income (loss) before income taxes	89,250	75,743	222,740	115,731
Income tax benefit (provision)	(25,778)	(24,085)	(56,519)	(38,405)
Net income (loss)	63,472	51,658	166,221	77,326
Reportable Legal Entities | Non-Guarantor Subsidiaries
Revenues:
Net revenues	10,707	11,706	31,371	19,349
Operating expenses:
Marketing and promotions	435	816	1,312	1,458
General and administrative	1,844	1,810	5,492	3,060
Corporate	527	1,317	2,119	2,112
Impairment charges	3,787		3,787
Management fee		300		500
Depreciation and amortization	55	144	378	233
Total operating expenses	12,735	11,184	30,927	18,654
(Loss) gain on sale of asset or disposal of property and equipment	(9)		(7)
Operating (loss) income	(2,037)	522	437	695
Interest expense, net	(1,515)	(416)	(2,459)	(694)
Net income (loss) before income taxes	(3,552)	106	(2,022)	1
Income tax benefit (provision)	944	(26)	741	66
Net income (loss)	(2,608)	80	(1,281)	67
Reportable Legal Entities | Gaming and Pari-mutuel Commissions | Guarantor Subsidiaries
Revenues:
Net revenues	359,897	343,825	1,036,650	760,033
Operating expenses:
Operating expenses	174,602	168,102	503,741	389,182
Reportable Legal Entities | Gaming and Pari-mutuel Commissions | Non-Guarantor Subsidiaries
Revenues:
Net revenues	8,272	8,823	23,767	14,510
Operating expenses:
Operating expenses	5,460	5,877	15,817	9,722
Reportable Legal Entities | Non-gaming | Eldorado Resorts, Inc. (Parent Obligor)
Revenues:
Net revenues	10		10
Reportable Legal Entities | Non-gaming | Guarantor Subsidiaries
Revenues:
Net revenues	116,639	117,347	316,216	271,515
Operating expenses:
Operating expenses	68,046	75,445	198,113	178,036
Reportable Legal Entities | Non-gaming | Non-Guarantor Subsidiaries
Revenues:
Net revenues	2,435	2,883	7,604	4,839
Operating expenses:
Operating expenses	627	920	2,022	1,569
Consolidating and Eliminating Entries
Operating expenses:
Subsidiary income (loss)	(60,864)	(51,738)	(164,940)	(77,393)
Net income (loss) before income taxes	(60,864)	(51,738)	(164,940)	(77,393)
Net income (loss)	$ (60,864)	$ (51,738)	$ (164,940)	$ (77,393)