Consolidating Condensed Financial Information - Consolidating Condensed Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues:
Gaming and pari-mutuel commissions			$ 835,778	$ 539,245
Non-gaming			252,976	216,572
Gross revenues	$ 483,036	$ 266,256	1,088,754	755,817
Less-promotional allowances	(38,162)	(24,691)	(87,776)	(69,371)
Net operating revenues	444,874	241,565	1,000,978	686,446
Operating expenses:
Gaming and pari-mutuel commissions			438,336	307,669
Non-gaming			110,167	104,611
Marketing and promotions	24,634	11,323	54,845	30,664
General and administrative	68,585	34,094	155,778	98,129
Corporate	7,718	4,426	21,734	15,684
Depreciation and amortization	29,122	15,810	69,635	47,597
Total operating expenses	363,837	208,731	850,495	604,354
Loss on sale of asset or disposal of property	4	25	(51)	(740)
Acquisition charges			(89,172)	(5,326)
EQUITY IN LOSS OF UNCONSOLIDATED AFFILIATE	(23)		(305)
OPERATING (LOSS) INCOME	78,924	28,109	60,955	76,026
Interest expense, net			(69,380)	(38,375)
Loss on early retirement of debt, net	(10,030)		(37,347)	(155)
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	39,711	15,520	(45,772)	37,496
Income tax benefit (provision)	(11,595)	(5,838)	27,625	(13,654)
INCOME (LOSS) FROM CONTINUING OPERATIONS	28,116	9,682	(18,147)	23,842
Income from discontinued operations, net of income taxes	1,438		2,393
NET INCOME (LOSS)	$ 29,554	$ 9,682	(15,754)	23,842
Reportable Legal Entities | Eldorado Resorts, Inc. (Parent Obligor)
Operating expenses:
Corporate			21,413	15,414
Management fee			(20,064)	(15,496)
Depreciation and amortization			635	330
Total operating expenses			1,984	248
Loss on sale of asset or disposal of property			(21)
Acquisition charges			(69,628)	(5,326)
OPERATING (LOSS) INCOME			(71,633)	(5,574)
Interest expense, net			(49,576)	(18,607)
Loss on early retirement of debt, net			(37,347)	(155)
Subsidiary income (loss)			77,197	61,814
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES			(81,359)	37,478
Income tax benefit (provision)			64,455	(13,636)
INCOME (LOSS) FROM CONTINUING OPERATIONS			(16,904)
Income from discontinued operations, net of income taxes			1,150
NET INCOME (LOSS)			(15,754)	23,842
Reportable Legal Entities | Guarantor Subsidiaries
Revenues:
Gaming and pari-mutuel commissions			820,452	539,010
Non-gaming			248,034	216,473
Gross revenues			1,068,486	755,483
Less-promotional allowances			(86,858)	(69,371)
Net operating revenues			981,628	686,112
Operating expenses:
Gaming and pari-mutuel commissions			427,680	307,669
Non-gaming			109,518	104,611
Marketing and promotions			53,401	30,661
General and administrative			152,717	98,129
Corporate			(1,791)	270
Management fee			19,564	15,496
Depreciation and amortization			68,767	47,267
Total operating expenses			829,856	604,103
Loss on sale of asset or disposal of property			(30)	(740)
Acquisition charges			(19,544)
EQUITY IN LOSS OF UNCONSOLIDATED AFFILIATE			(305)
OPERATING (LOSS) INCOME			131,893	81,269
Interest expense, net			(19,110)	(19,768)
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES			112,783	61,501
Income tax benefit (provision)			(36,896)	(18)
INCOME (LOSS) FROM CONTINUING OPERATIONS			75,887
Income from discontinued operations, net of income taxes			1,243
NET INCOME (LOSS)			77,130	61,483
Reportable Legal Entities | Non-Guarantor Subsidiaries
Revenues:
Gaming and pari-mutuel commissions			15,326	235
Non-gaming			4,942	99
Gross revenues			20,268	334
Less-promotional allowances			(918)
Net operating revenues			19,350	334
Operating expenses:
Gaming and pari-mutuel commissions			10,656
Non-gaming			649
Marketing and promotions			1,444	3
General and administrative			3,061
Corporate			2,112
Management fee			500
Depreciation and amortization			233
Total operating expenses			18,655	3
OPERATING (LOSS) INCOME			695	331
Interest expense, net			(694)
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES			1	331
Income tax benefit (provision)			66
INCOME (LOSS) FROM CONTINUING OPERATIONS			67
NET INCOME (LOSS)			67	331
Consolidating and Eliminating Entries
Operating expenses:
Subsidiary income (loss)			(77,197)	(61,814)
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES			(77,197)	(61,814)
INCOME (LOSS) FROM CONTINUING OPERATIONS			(77,197)
NET INCOME (LOSS)			$ (77,197)	$ (61,814)