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Overview and Summary of Significant Accounting Policies - Narrative (Details)
 1 Months Ended 3 Months Ended 12 Months Ended
Jan. 01, 2019
USD ($)
Dec. 29, 2016
USD ($)
Jul. 31, 2017
USD ($)
Jun. 30, 2019
USD ($)
Sep. 30, 2018
USD ($)
Jun. 30, 2018
USD ($)
Mar. 31, 2018
USD ($)
Dec. 31, 2019
USD ($)
Segment
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Overview and Summary of Significant Accounting Policies [Line Items]                    
Cumulative effect adjustment to retained earnings $ 0                  
Number of reportable segments | Segment               3    
Remaining maturities of highly-liquid investments               three months or less    
Renewal lease starting period               2019    
Percentage of non equity ownership related redeemable noncontrolling interests               54.50%    
Business interruption gain       $ 141,000 $ 35,000 $ 377,000 $ 190,000 $ 141,000 $ 602,000 $ 2,692,000
Operating lease right-of-use assets               103,314,000    
Operating lease, liability               $ 105,031,000    
Accounting Standards Update 2016-02                    
Overview and Summary of Significant Accounting Policies [Line Items]                    
Operating lease right-of-use assets 68,000,000                  
Operating lease, liability $ 68,000,000                  
Liability Based Awards                    
Overview and Summary of Significant Accounting Policies [Line Items]                    
Share based compensation arrangements requisite service period               3 years    
Equity Based Awards                    
Overview and Summary of Significant Accounting Policies [Line Items]                    
Share based compensation arrangements requisite service period               3 years    
Restricted Stock                    
Overview and Summary of Significant Accounting Policies [Line Items]                    
Share based compensation arrangements vesting period               3 years    
Stock Options                    
Overview and Summary of Significant Accounting Policies [Line Items]                    
Share based compensation arrangements requisite service period               5 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]                    
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%    
Maximum                    
Overview and Summary of Significant Accounting Policies [Line Items]                    
Lease expiration period               25 years    
Building | Minimum                    
Overview and Summary of Significant Accounting Policies [Line Items]                    
Property, plant and equipment, useful life               15 years    
Building | Maximum                    
Overview and Summary of Significant Accounting Policies [Line Items]                    
Property, plant and equipment, useful life               40 years    
Equipment | Minimum                    
Overview and Summary of Significant Accounting Policies [Line Items]                    
Property, plant and equipment, useful life               3 years    
Equipment | Maximum                    
Overview and Summary of Significant Accounting Policies [Line Items]                    
Property, plant and equipment, useful life               12 years    
Land | Maximum                    
Overview and Summary of Significant Accounting Policies [Line Items]                    
Lease expiration period               42 years    
Mount Royal Hotel                    
Overview and Summary of Significant Accounting Policies [Line Items]                    
Asset impairment loss   $ 2,200,000           $ 200,000    
Property and business interruption insurance claims total     $ 36,300,000              
Insurance proceeds allocated to insurance receivable               2,200,000    
Impairment recoveries               29,300,000    
Business interruption gain               2,500,000    
Insurance settlements to offset non capitalized costs               1,300,000    
Deferred revenue recognized               $ 1,000,000.0