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New Accounting Pronouncements - Cumulative Effect on Statements of Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Cumulative effect of adoption
Revenues	$ 789,651		$ 2,432,649
Less promotional allowances		$ (48,843)		$ (136,684)
Net revenues	789,651	806,247	2,432,649	2,378,934
Operating expenses
General and administrative	125,084	107,201	379,006	363,112
Depreciation and amortization	56,852	66,483	175,801	205,688
Provision (recovery) for loan loss and unfunded loan commitments to the JIVDC and impairment losses		24,317	(16,367)	29,952
Insurance recoveries			(68)
Total operating expenses	633,808	662,584	1,922,917	1,959,995
Income from operations	155,843	143,663	509,732	418,939
Income from operations before income taxes	45,195	30,276	175,551	60,882
Income tax provision (benefit)	9,070	(759,064)	40,001	(750,641)
Net income	36,125	789,340	135,550	811,523
Gaming
Cumulative effect of adoption
Revenues	646,335		1,965,923
Operating expenses
Operating expenses	351,995	350,847	1,043,205	1,028,056
Food, beverage, hotel and other
Cumulative effect of adoption
Revenues	138,769		403,402
Operating expenses
Operating expenses	95,967	107,057	284,059	313,363
Management service fees
Cumulative effect of adoption
Revenues	637		6,043
Reimbursable management costs
Cumulative effect of adoption
Revenues	3,910		57,281
Operating expenses
Operating expenses	3,910	$ 6,679	57,281	$ 19,824
Balances Without Adoption of ASC 606
Cumulative effect of adoption
Revenues	841,462		2,550,447
Less promotional allowances	(47,538)		(139,691)
Net revenues	793,924		2,410,756
Operating expenses
General and administrative	125,084		379,006
Depreciation and amortization	56,852		175,801
Provision (recovery) for loan loss and unfunded loan commitments to the JIVDC and impairment losses			(16,367)
Insurance recoveries			(68)
Total operating expenses	638,124		1,901,712
Income from operations	155,800		509,044
Income from operations before income taxes	45,152		174,863
Income tax provision (benefit)	9,061		39,844
Net income	36,091		135,019
Balances Without Adoption of ASC 606 \| Gaming
Cumulative effect of adoption
Revenues	688,991		2,075,660
Operating expenses
Operating expenses	351,898		1,041,673
Balances Without Adoption of ASC 606 \| Food, beverage, hotel and other
Cumulative effect of adoption
Revenues	151,834		458,285
Operating expenses
Operating expenses	104,290		311,208
Balances Without Adoption of ASC 606 \| Management service fees
Cumulative effect of adoption
Revenues	637		6,043
Balances Without Adoption of ASC 606 \| Reimbursable management costs
Cumulative effect of adoption
Revenues			10,459
Operating expenses
Operating expenses			10,459
ASU 2014-09 \| Effect of Change Higher / (Lower)
Cumulative effect of adoption
Revenues	(51,811)		(117,798)
Less promotional allowances	47,538		139,691
Net revenues	(4,273)		21,893
Operating expenses
Total operating expenses	(4,316)		21,205
Income from operations	43		688
Income from operations before income taxes	43		688
Income tax provision (benefit)	9		157
Net income	34		531
ASU 2014-09 \| Effect of Change Higher / (Lower) \| Gaming
Cumulative effect of adoption
Revenues	(42,656)		(109,737)
Operating expenses
Operating expenses	97		1,532
ASU 2014-09 \| Effect of Change Higher / (Lower) \| Food, beverage, hotel and other
Cumulative effect of adoption
Revenues	(13,065)		(54,883)
Operating expenses
Operating expenses	(8,323)		(27,149)
ASU 2014-09 \| Effect of Change Higher / (Lower) \| Reimbursable management costs
Cumulative effect of adoption
Revenues	3,910		46,822
Operating expenses
Operating expenses	3,910		46,822
ASU 2014-09 \| Loyalty Point Impact
Cumulative effect of adoption
Revenues	(140)		(2,220)
Net revenues	(140)		(2,220)
Operating expenses
Total operating expenses	(97)		(1,532)
Income from operations	(43)		(688)
Income from operations before income taxes	(43)		(688)
Income tax provision (benefit)	(9)		(157)
Net income	(34)		(531)
ASU 2014-09 \| Loyalty Point Impact \| Gaming
Cumulative effect of adoption
Revenues	(88)		(2,070)
Operating expenses
Operating expenses	(97)		(1,532)
ASU 2014-09 \| Loyalty Point Impact \| Food, beverage, hotel and other
Cumulative effect of adoption
Revenues	(52)		(150)
ASU 2014-09 \| Promotional Allowance Discretionary Complimentaries Impact
Cumulative effect of adoption
Revenues	47,538		139,691
Less promotional allowances	(47,538)		(139,691)
ASU 2014-09 \| Promotional Allowance Discretionary Complimentaries Impact \| Gaming
Cumulative effect of adoption
Revenues	42,744		111,807
ASU 2014-09 \| Promotional Allowance Discretionary Complimentaries Impact \| Food, beverage, hotel and other
Cumulative effect of adoption
Revenues	4,794		27,884
ASU 2014-09 \| Reimbursable Expense - Casino Rama Impact
Cumulative effect of adoption
Revenues	(3,910)		(46,822)
Net revenues	(3,910)		(46,822)
Operating expenses
Total operating expenses	(3,910)		(46,822)
ASU 2014-09 \| Reimbursable Expense - Casino Rama Impact \| Reimbursable management costs
Cumulative effect of adoption
Revenues	(3,910)		(46,822)
Operating expenses
Operating expenses	(3,910)		(46,822)
ASU 2014-09 \| Racing Revenue Impact
Cumulative effect of adoption
Revenues	8,323		27,149
Net revenues	8,323		27,149
Operating expenses
Total operating expenses	8,323		27,149
ASU 2014-09 \| Racing Revenue Impact \| Food, beverage, hotel and other
Cumulative effect of adoption
Revenues	8,323		27,149
Operating expenses
Operating expenses	$ 8,323		$ 27,149