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Overview and Summary of Significant Accounting Policies - Narrative (Details)
$ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended
Dec. 29, 2016
USD ($)
Jul. 31, 2017
USD ($)
Sep. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Segment
shares
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Overview and Summary of Significant Accounting Policies [Line Items]            
Number of reportable segments | Segment       3    
Remaining maturities of highly-liquid investments       three months or less    
Revenue recognition description of capitalized contract costs       Capitalized contract costs are expensed upon the transfer of the related goods or services and are included in cost of services or cost of products sold, as applicable.    
Percentage of non equity ownership related redeemable noncontrolling interests       54.50%    
Business interruption gain       $ 602 $ 2,692  
Share based compensation arrangements requisite service period       3 years    
Amount reclassified from operating expenses (cost of services and corporate activities) to other expense, with retrospective effect [1]       $ 1,744 2,028 $ 1,656
Tax cuts and jobs act of 2017 incomplete accounting current income tax expense     $ 3,100      
ASU 2017-07            
Overview and Summary of Significant Accounting Policies [Line Items]            
Cumulative-effect adjustment from accumulated other comprehensive income (“AOCI”) to beginning retained earnings       $ 600    
Amount reclassified from operating expenses (cost of services and corporate activities) to other expense, with retrospective effect         $ 2,028 $ 1,656
ASU 2018-02            
Overview and Summary of Significant Accounting Policies [Line Items]            
Amount reclassified the income tax effects of the tax act from AOCI to retained earnings     $ 1,600      
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    
Stock options granted | shares       0    
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%    
Minimum | Accounting Standards Update 2016 02            
Overview and Summary of Significant Accounting Policies [Line Items]            
Anticipated lease liability and related right of use asset       $ 72,000    
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    
Mount Royal Hotel            
Overview and Summary of Significant Accounting Policies [Line Items]            
Asset impairment loss $ 2,200     $ 200    
Property and business interruption insurance claims total   $ 36,300        
Insurance proceeds allocated to insurance receivable       2,200    
Impairment recoveries       29,300    
Business interruption gain       2,500    
Insurance settlements to offset non capitalized costs       1,300    
Deferred revenue recognized       $ 1,000    
[1] We adopted ASU 2017-07 on January 1, 2018, which requires retrospective adoption. As a result, we recorded the nonservice cost component of net periodic benefit cost within other expense for the year ended December 31, 2018, and we reclassified $2.0 million from operating expenses to other expense for 2017 and $1.7 million for 2016 to conform with current period presentation. Refer to Note 1 – Overview and Summary of Significant Accounting Policies for additional details on the impact of this adoption on our Consolidated Statements of Operations.