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Intangible Assets (Summary of Amortizing and Indefinite-Lived Intangibles) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Intangible Assets [Line Items]
Intangible assets, gross	$ 1,071,244	$ 1,067,725
Intangible assets, cumulative amortization	(42,748)	(40,505)
Intangible assets, cumulative impairment	(184,274)	(184,274)
Intangible assets, net	844,222	842,946
Amortizing intangibles:
Gross carrying value	44,672	42,503
Cumulative amortization	(8,788)	(6,545)
Cumulative impairment losses	0	0
Intangible assets, net	35,884	35,958
Indefinite lived intangible assets:
Gross carrying value	1,026,572	1,025,222
Cumulative amortization	(33,960)	(33,960)
Cumulative impairment losses	(184,274)	(184,274)
Intangible assets, net	$ 808,338	$ 806,988
Customer Relationships [Member]
Amortizing intangibles:
Weighted average life	4 years 6 months	5 years 2 months 13 days
Gross carrying value	$ 9,400	$ 9,400
Cumulative amortization	(5,188)	(3,470)
Cumulative impairment losses	0	0
Intangible assets, net	$ 4,212	$ 5,930
Off-Market Favorable Lease [Member]
Amortizing intangibles:
Weighted average life	37 years 3 months	38 years
Gross carrying value	$ 11,730	$ 11,730
Cumulative amortization	(3,246)	(3,075)
Cumulative impairment losses	0	0
Intangible assets, net	8,484	8,655
Development Agreement
Amortizing intangibles:
Gross carrying value	21,373	21,373
Cumulative amortization	0	0
Cumulative impairment losses	0	0
Intangible assets, net	$ 21,373	21,373
Other Intangible Assets [Member]
Amortizing intangibles:
Weighted average life	4 years 9 months
Gross carrying value	$ 2,169
Cumulative amortization	(354)
Cumulative impairment losses	0
Intangible assets, net	1,815
Trademarks
Indefinite lived intangible assets:
Gross carrying value	151,887	151,887
Cumulative amortization	0	0
Cumulative impairment losses	(4,300)	(4,300)
Intangible assets, net	147,587	147,587
Gaming License Rights
Indefinite lived intangible assets:
Gross carrying value	874,685	873,335
Cumulative amortization	(33,960)	(33,960)
Cumulative impairment losses	(179,974)	(179,974)
Intangible assets, net	$ 660,751	$ 659,401

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