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Goodwill (Schedule of Goodwill By Segment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Sep. 27, 2016	Dec. 31, 2015
Goodwill [Line Items]
Gross carrying value	$ 1,246,177
Cumulative amortization	(6,134)
Goodwill, Impaired, Accumulated Impairment Loss	177,941
Goodwill	1,062,102	$ 888,224	$ 826,476		$ 685,310
Goodwill, Impairment Loss	0	0	(12,462)
Las Vegas Locals
Goodwill [Line Items]
Gross carrying value	593,567
Cumulative amortization	0
Goodwill, Impaired, Accumulated Impairment Loss	165,479
Goodwill	428,088
Downtown Las Vegas
Goodwill [Line Items]
Gross carrying value	6,997
Cumulative amortization	(6,134)
Goodwill, Impaired, Accumulated Impairment Loss	0
Goodwill	863
Midwest & South
Goodwill [Line Items]
Gross carrying value	645,613
Cumulative amortization	0
Goodwill, Impaired, Accumulated Impairment Loss	12,462
Goodwill	633,151
Goodwill, Impairment Loss			$ 12,500
Subsidiaries [Member]
Goodwill [Line Items]
Goodwill	$ 173,900	$ 61,700		$ 130,324

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Goodwill, Accumulated Amortization

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