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Overview and Summary of Significant Accounting Policies - Narrative (Details)
12 Months Ended
Aug. 05, 2020
USD ($)
$ / shares
Dec. 31, 2020
USD ($)
Segment
Dec. 31, 2019
USD ($)
Jun. 08, 2019
USD ($)
Dec. 31, 2018
USD ($)
Overview and Summary of Significant Accounting Policies [Line Items]          
Number of reportable segments | Segment   3      
Initial Investment $ 135,000,000        
Fees $ 9,200,000        
Cash Dividends Payable Percentage 5.50%        
Frequency of periodic payment of cumulative dividend quarterly        
Conversion price per share | $ / shares $ 21.25        
Preferred stock redemption term additional Convertible Preferred Stock, which we may access during the 12 months        
Minimum liquidity requirement   $ 100,000,000      
Fees related to the amendment $ 1,700,000        
Pledge percentage of capital stock 100.00%        
Non-cash goodwill impairment charge   185,789,000      
Goodwill   $ 99,847,000 $ 287,983,000   $ 261,330,000
Remaining maturities of highly-liquid investments   three months or less      
Proceeds from life insurance policy   $ 24,800,000      
Percentage of non equity ownership related redeemable noncontrolling interests   54.50%      
Share based compensation arrangements requisite service period   2 years      
Stock Options          
Overview and Summary of Significant Accounting Policies [Line Items]          
Share based compensation arrangements requisite service period   2 years      
Liability Based Awards          
Overview and Summary of Significant Accounting Policies [Line Items]          
Share based compensation arrangements requisite service period   3 years      
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]          
Goodwill       $ 20,194,000  
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   $ 185,800,000      
Goodwill   99,800,000 $ 186,105,000    
U.S Audio Visual Production Business          
Overview and Summary of Significant Accounting Policies [Line Items]          
Non-cash impairment charge to intangible assets   $ 15,700      
LIBOR rate [Member]          
Overview and Summary of Significant Accounting Policies [Line Items]          
Variable rate 3.50%        
Maximum          
Overview and Summary of Significant Accounting Policies [Line Items]          
Proceeds from issuance of additional preferred stock $ 45,000,000        
Lease expiration period   23 years      
Share based compensation arrangement performance period   3 years 4 months 24 days      
Maximum | Equity Based Awards          
Overview and Summary of Significant Accounting Policies [Line Items]          
Share based compensation arrangements requisite service period   3 years      
Maximum | Building          
Overview and Summary of Significant Accounting Policies [Line Items]          
Property, plant and equipment, useful life   40 years      
Maximum | Equipment          
Overview and Summary of Significant Accounting Policies [Line Items]          
Property, plant and equipment, useful life   12 years      
Maximum | Land          
Overview and Summary of Significant Accounting Policies [Line Items]          
Lease expiration period   47 years      
Minimum [Member]          
Overview and Summary of Significant Accounting Policies [Line Items]          
Share based compensation arrangement performance period   1 year      
Minimum [Member] | Equity Based Awards          
Overview and Summary of Significant Accounting Policies [Line Items]          
Share based compensation arrangements requisite service period   3 months      
Minimum [Member] | Building          
Overview and Summary of Significant Accounting Policies [Line Items]          
Property, plant and equipment, useful life   15 years      
Minimum [Member] | Equipment          
Overview and Summary of Significant Accounting Policies [Line Items]          
Property, plant and equipment, useful life   3 years