Overview and Basis of Presentation - Narrative (Details) $ / shares in Units, $ in Thousands			1 Months Ended			3 Months Ended		6 Months Ended
	Aug. 05, 2020 USD ($) $ / shares	Jul. 24, 2020 USD ($)	Aug. 31, 2020 USD ($)	Jul. 31, 2020 USD ($)	May 31, 2020 USD ($)	Jun. 30, 2020 USD ($) Segment	Mar. 31, 2020 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Overview And Summary Of Significant Accounting Policies [Line Items]
Number of reportable segments | Segment						3
Proceeds from Life Insurance Policy					$ 24,800
Proceeds from sale of warehouse								$ 4,654	$ 768
Initial Investment	$ 135,000
Fees	$ 9,000
Cash Dividends Payable Percentage	5.50%
Conversion price per share | $ / shares	$ 21.25
Preferred stock redemption term	additional Convertible Preferred Stock, which we may access during the next 12 months
Non-cash goodwill impairment charge								186,075
Goodwill						$ 95,159		$ 95,159			$ 287,983
Percentage of non equity ownership related redeemable noncontrolling interests								54.50%
Glacier Park Inc
Overview And Summary Of Significant Accounting Policies [Line Items]
Percentage of non-equity ownership related to non-redeemable noncontrolling interests								20.00%
Mountain Park Lodges
Overview And Summary Of Significant Accounting Policies [Line Items]
Percentage of non-equity ownership related to non-redeemable noncontrolling interests								40.00%
Geothermal Lagoon Attraction
Overview And Summary Of Significant Accounting Policies [Line Items]
Percentage of non-equity ownership related to non-redeemable noncontrolling interests								49.00%
GES
Overview And Summary Of Significant Accounting Policies [Line Items]
Non-cash goodwill impairment charge						113,100	$ 72,700
Non-cash impairment charges							$ 15,700
Goodwill						$ 95,200		$ 95,200
Scenario Forecast
Overview And Summary Of Significant Accounting Policies [Line Items]
Minimum liquidity requirement										$ 100,000
Maximum
Overview And Summary Of Significant Accounting Policies [Line Items]
Proceeds from issuance of convertible perpetual preferred stock	$ 45,000
Lease expiration period								25 years
Maximum | Land
Overview And Summary Of Significant Accounting Policies [Line Items]
Lease expiration period								42 years
Subsequent Event
Overview And Summary Of Significant Accounting Policies [Line Items]
Proceeds from sale of warehouse		$ 17,000		$ 17,000
Minimum liquidity requirement	125,000
Fees related to the amendment	$ 1,600
Pledge Percentage Of Capital Stock	100.00%
Subsequent Event | Unsecured Debt [Member]
Overview And Summary Of Significant Accounting Policies [Line Items]
Expansion feature - amount available as incremental revolver	$ 250,000
Subsequent Event | LIBOR rate [Member]
Overview And Summary Of Significant Accounting Policies [Line Items]
Variable rate	3.50%
Subsequent Event | Maximum
Overview And Summary Of Significant Accounting Policies [Line Items]
Proceeds from issuance of convertible perpetual preferred stock			$ 180,000