Acquisitions - Summary of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Jan. 11, 2019	Dec. 31, 2018	Aug. 31, 2018
Business Acquisition [Line Items]
Goodwill	$ 366.8	$ 367.1		$ 338.0
Saratoga New York And Saratoga Colorado
Business Acquisition [Line Items]
Current assets					$ 1.9
Property and equipment					57.4
Goodwill					20.4
Intangible assets					95.4
Current liabilities					(5.2)
Debt					(54.7)
Assets acquired and liabilities assumed					$ 115.2
Presque Isle
Business Acquisition [Line Items]
Current assets			$ 2.1
Property and equipment			78.5
Goodwill			26.1
Intangible assets			71.2
Current liabilities			(5.2)
Non-current liabilities			(0.6)
Assets acquired and liabilities assumed			$ 172.1