Intangible Assets (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) item	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)
Intangible assets
Indefinite-life intangible assets	$ 425,505		$ 375,405
Other intangible assets, Gross Carrying Value	132,831		131,483
Other intangible assets, Accumulated Amortization	88,758		84,282
Finite-lived intangible assets, Net Book Value	44,073		47,201
Total intangible assets, Gross Carrying Value	558,336		506,888
Total intangible assets, Net Book Value	469,578		$ 422,606
Increase in other intangible assets during the period	47,000
Payment for Category 4 license	50,100
Computer software capitalized	1,400
Intangible asset amortization expense	$ 4,500	$ 5,200
Weighted average remaining amortization period	4 years 7 months 6 days
Maximum
Intangible assets
Number of slot machines in Category 4 facility | item	750
Number of table games in Category 4 facility | item	30