New Accounting Pronouncements - Cumulative Effect on Statements of Income (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Cumulative effect of adoption
Revenues	$ 816,085
Less promotional allowances		$ (41,858)
Net revenues	816,085	776,224
Operating expenses
General and administrative	121,263	125,815
Depreciation and amortization	60,390	70,236
Impairment losses	618
Total operating expenses	643,951	635,937
Income from operations	172,134	140,287
Income from operations before income taxes	61,126	7,302
Income tax provision	15,689	2,198
Net income	45,437	5,104
Gaming
Cumulative effect of adoption
Revenues	654,494
Operating expenses
Operating expenses	340,516	332,053
Food, beverage, hotel and other
Cumulative effect of adoption
Revenues	130,969
Operating expenses
Operating expenses	92,980	101,075
Management service fees
Cumulative effect of adoption
Revenues	2,438
Reimbursable management costs
Cumulative effect of adoption
Revenues	28,184
Operating expenses
Operating expenses	28,184	$ 6,758
Balances Without Adoption of ASC 606
Cumulative effect of adoption
Revenues	841,976
Less promotional allowances	(40,263)
Net revenues	801,713
Operating expenses
General and administrative	121,263
Depreciation and amortization	60,390
Impairment losses	618
Total operating expenses	630,040
Income from operations	171,673
Income from operations before income taxes	60,665
Income tax provision	15,571
Net income	45,094
Balances Without Adoption of ASC 606 \| Gaming
Cumulative effect of adoption
Revenues	686,714
Operating expenses
Operating expenses	339,489
Balances Without Adoption of ASC 606 \| Food, beverage, hotel and other
Cumulative effect of adoption
Revenues	146,484
Operating expenses
Operating expenses	101,940
Balances Without Adoption of ASC 606 \| Management service fees
Cumulative effect of adoption
Revenues	2,438
Balances Without Adoption of ASC 606 \| Reimbursable management costs
Cumulative effect of adoption
Revenues	6,340
Operating expenses
Operating expenses	6,340
ASU 2014-09 \| Effect of Change Higher / (Lower)
Cumulative effect of adoption
Revenues	(25,891)
Less promotional allowances	40,263
Net revenues	14,372
Operating expenses
Total operating expenses	13,911
Income from operations	461
Income from operations before income taxes	461
Income tax provision	118
Net income	343
ASU 2014-09 \| Effect of Change Higher / (Lower) \| Gaming
Cumulative effect of adoption
Revenues	(32,220)
Operating expenses
Operating expenses	1,027
ASU 2014-09 \| Effect of Change Higher / (Lower) \| Food, beverage, hotel and other
Cumulative effect of adoption
Revenues	(15,515)
Operating expenses
Operating expenses	(8,960)
ASU 2014-09 \| Effect of Change Higher / (Lower) \| Reimbursable management costs
Cumulative effect of adoption
Revenues	21,844
Operating expenses
Operating expenses	21,844
ASU 2014-09 \| Loyalty Point Impact
Cumulative effect of adoption
Revenues	(1,488)
Net revenues	(1,488)
Operating expenses
Total operating expenses	(1,027)
Income from operations	(461)
Income from operations before income taxes	(461)
Income tax provision	(118)
Net income	(343)
ASU 2014-09 \| Loyalty Point Impact \| Gaming
Cumulative effect of adoption
Revenues	(1,419)
Operating expenses
Operating expenses	(1,027)
ASU 2014-09 \| Loyalty Point Impact \| Food, beverage, hotel and other
Cumulative effect of adoption
Revenues	(69)
ASU 2014-09 \| Promotional Allowance Discretionary Complimentaries Impact
Cumulative effect of adoption
Revenues	33,639
Less promotional allowances	(33,639)
ASU 2014-09 \| Promotional Allowance Discretionary Complimentaries Impact \| Gaming
Cumulative effect of adoption
Revenues	33,639
ASU 2014-09 \| Promotional Allowance Point Redemption Impact
Cumulative effect of adoption
Revenues	6,624
Less promotional allowances	(6,624)
ASU 2014-09 \| Promotional Allowance Point Redemption Impact \| Food, beverage, hotel and other
Cumulative effect of adoption
Revenues	6,624
ASU 2014-09 \| Reimbursable Expense - Casino Rama Impact
Cumulative effect of adoption
Revenues	(21,844)
Net revenues	(21,844)
Operating expenses
Total operating expenses	(21,844)
ASU 2014-09 \| Reimbursable Expense - Casino Rama Impact \| Reimbursable management costs
Cumulative effect of adoption
Revenues	(21,844)
Operating expenses
Operating expenses	(21,844)
ASU 2014-09 \| Racing Revenue Impact
Cumulative effect of adoption
Revenues	8,960
Net revenues	8,960
Operating expenses
Total operating expenses	8,960
ASU 2014-09 \| Racing Revenue Impact \| Food, beverage, hotel and other
Cumulative effect of adoption
Revenues	8,960
Operating expenses
Operating expenses	$ 8,960

The estimated retail value of accommodations, food and beverage, and other services furnished to guests without charge.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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