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Long-Lived Assets (Details) $ in Millions	3 Months Ended
Long-Lived Assets (Details) $ in Millions	Sep. 25, 2016 a property	Jun. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jun. 24, 2018 USD ($)
Property, Plant and Equipment [Line Items]
Closed operations, properties \| property	1
Area of land \| a	670
Wildwater Kingdom [Member] \| Other Assets [Member]
Property, Plant and Equipment [Line Items]
Assets held-for-sale \| $		$ 9.0	$ 9.0	$ 9.0