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Acquisitions - Narrative (Details) $ in Thousands, $ in Millions					3 Months Ended		9 Months Ended		12 Months Ended
	Jul. 25, 2019 USD ($)	Jun. 08, 2019 USD ($) Hotel	Jun. 08, 2019 CAD ($) Hotel	May 16, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Business Acquisition [Line Items]
Operating loss					$ (9,410)	$ 52,142	$ (71,803)	$ 82,374
Total revenue					63,072	353,743	389,863	1,009,686
Pursuit
Business Acquisition [Line Items]
Total revenue					48,815	$ 135,043	67,602	$ 201,119
Belton Chalet
Business Acquisition [Line Items]
Purchase price				$ 3,200
Acquisition related costs				$ 300
Business acquisition date				May 16, 2019
Mountain Park Lodges
Business Acquisition [Line Items]
Acquisition related costs									$ 900
Business acquisition date		Jun. 08, 2019	Jun. 08, 2019
Percentage of controlling interest acquired		60.00%	60.00%
Number of hotels acquired \| Hotel		7	7
Total consideration		$ 76,000	$ 100.6
Percentage of operations results consolidated to financial statements		100.00%	100.00%
Percentage of non-redeemable noncontrolling portion of income (loss) recorded in financial statements		40.00%	40.00%
Operating loss					4,400		200
Total revenue					$ 8,900		$ 12,900
Identifiable intangible assets acquired		$ 20,200
Weighted average amortization period		30 years 9 months 18 days	30 years 9 months 18 days
New Sky Lagoon Attraction \| Pursuit \| Sky Lagoon Attraction
Business Acquisition [Line Items]
Percentage of controlling interest acquired	51.00%
Payments to acquire controlling interest	$ 13,200