Consolidating Condensed Financial Information - Consolidating Condensed Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues:
Gaming and pari-mutuel commissions			$ 465,750	$ 351,114
Non-gaming			143,033	138,447
Gross revenues	$ 389,237	$ 255,010	608,783	489,561
Less-promotional allowances	(34,057)	(23,695)	(52,678)	(44,680)
Net operating revenues	355,180	231,315	556,105	444,881
Operating expenses:
Gaming and pari-mutuel commissions			248,951	200,891
Non-gaming			65,807	68,311
Marketing and promotions	20,158	9,766	30,214	19,341
General and administrative	55,379	32,380	87,154	64,035
Corporate	7,442	4,354	14,016	11,258
Depreciation and amortization	24,909	15,583	40,513	31,787
Total operating expenses	301,683	200,768	486,655	395,623
Loss on sale of asset or disposal of property	(89)	(836)	(57)	(765)
Acquisition charges			(87,078)	(576)
EQUITY IN LOSS OF UNCONSOLIDATED AFFILIATE	(60)		(282)
OPERATING (LOSS) INCOME	(32,116)	29,655	(17,967)	47,917
Interest expense, net			(40,197)	(25,786)
Loss on early retirement of debt, net	(27,317)	(89)	(27,317)	(155)
NET (LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(86,960)	16,771	(85,481)	21,976
BENEFIT (PROVISION) FOR INCOME TAXES	39,677	(5,980)	39,219	(7,816)
NET (LOSS) INCOME FROM CONTINUING OPERATIONS	(47,283)	10,791	(46,262)	14,160
Income from discontinued operations, net of taxes	955		955
NET (LOSS) INCOME	$ (46,328)	$ 10,791	(45,307)	14,160
Reportable Legal Entities | Eldorado Resorts, Inc. (Parent Obligor)
Operating expenses:
Corporate			13,548	10,959
Management fee			(13,068)	(11,285)
Depreciation and amortization			332	211
Total operating expenses			812	(115)
Loss on sale of asset or disposal of property			(21)
Acquisition charges			(69,173)	(576)
OPERATING (LOSS) INCOME			(70,006)	(461)
Interest expense, net			(26,993)	(12,606)
Loss on early retirement of debt, net			(27,317)	(155)
Subsidiary income (loss)			25,117	35,180
NET (LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES			(99,199)	21,958
BENEFIT (PROVISION) FOR INCOME TAXES			52,937	(7,798)
NET (LOSS) INCOME FROM CONTINUING OPERATIONS			(46,262)
Income from discontinued operations, net of taxes			955
NET (LOSS) INCOME			(45,307)	14,160
Reportable Legal Entities | Guarantor Subsidiaries
Revenues:
Gaming and pari-mutuel commissions			459,653	351,006
Non-gaming			142,237	138,447
Gross revenues			601,890	489,453
Less-promotional allowances			(52,223)	(44,680)
Net operating revenues			549,667	444,773
Operating expenses:
Gaming and pari-mutuel commissions			244,710	200,891
Non-gaming			65,547	68,311
Marketing and promotions			29,579	19,339
General and administrative			85,904	64,035
Corporate			876	299
Management fee			12,868	11,285
Depreciation and amortization			40,092	31,576
Total operating expenses			479,576	395,736
Loss on sale of asset or disposal of property			(36)	(765)
Acquisition charges			(17,905)
EQUITY IN LOSS OF UNCONSOLIDATED AFFILIATE			(282)
OPERATING (LOSS) INCOME			51,868	48,272
Interest expense, net			(12,926)	(13,180)
Subsidiary income (loss)			368	106
NET (LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES			39,310	35,198
BENEFIT (PROVISION) FOR INCOME TAXES			(13,809)	(18)
NET (LOSS) INCOME FROM CONTINUING OPERATIONS			25,501
Income from discontinued operations, net of taxes			955
NET (LOSS) INCOME			26,456	35,180
Reportable Legal Entities | Non-Guarantor Subsidiaries
Revenues:
Gaming and pari-mutuel commissions			6,097	108
Non-gaming			2,000
Gross revenues			8,097	108
Less-promotional allowances			(455)
Net operating revenues			7,642	108
Operating expenses:
Gaming and pari-mutuel commissions			4,241
Non-gaming			260
Marketing and promotions			635	2
General and administrative			1,250
Corporate			796
Management fee			200
Depreciation and amortization			89
Total operating expenses			7,471	2
OPERATING (LOSS) INCOME			171	106
Interest expense, net			(278)
NET (LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES			(107)	106
BENEFIT (PROVISION) FOR INCOME TAXES			91
NET (LOSS) INCOME FROM CONTINUING OPERATIONS			(16)
NET (LOSS) INCOME			(16)	106
Consolidating and Eliminating Entries
Revenues:
Non-gaming			(1,204)
Gross revenues			(1,204)
Net operating revenues			(1,204)
Operating expenses:
Corporate			(1,204)
Total operating expenses			(1,204)
Subsidiary income (loss)			(25,485)	(35,286)
NET (LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES			(25,485)	(35,286)
NET (LOSS) INCOME FROM CONTINUING OPERATIONS			(25,485)
Income from discontinued operations, net of taxes			(955)
NET (LOSS) INCOME			$ (26,440)	$ (35,286)