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Description of Business and Summary of Significant Accounting Policies - Narrative (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Oct. 18, 2018
USD ($)
Sep. 30, 2018
Sep. 30, 2017
Jun. 30, 2017
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Jan. 01, 2019
USD ($)
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                
Number of reportable segments         2      
Impairment on assets held for sale         $ 0 $ 0 $ 2,839,000  
Impairment of long-lived assets held-for-use         0 0    
Treasury stock reissued at lower than repurchase price         4,000,000.0 $ 100,000 $ 100,000  
Contract with customer, asset         $ 1,100,000      
Minimum                
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                
Finite-lived intangible asset, useful life         2 years      
Minimum | Building and Building Improvements                
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                
Property, plant and equipment, useful life         15 years      
Minimum | Transportation Equipment                
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                
Property, plant and equipment, useful life   10 years     5 years      
Minimum | Other Machinery and Equipment                
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                
Property, plant and equipment, useful life         3 years      
Maximum                
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                
Finite-lived intangible asset, useful life         10 years      
Maximum | Building and Building Improvements                
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                
Property, plant and equipment, useful life         39 years 6 months      
Maximum | Transportation Equipment                
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                
Property, plant and equipment, useful life     14 years 10 years 14 years      
Maximum | Other Machinery and Equipment                
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                
Property, plant and equipment, useful life         10 years      
Davis Transfer Company                
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                
Equity interest issued and issuable $ 750,000              
Scenario, Forecast | Accounting Standards Update 2016-02 | Subsequent Event | Minimum                
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                
Operating lease, right-of-use asset               $ 16,000,000.0
Operating lease liability               16,000,000.0
Scenario, Forecast | Accounting Standards Update 2016-02 | Subsequent Event | Maximum                
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                
Operating lease, right-of-use asset               18,000,000.0
Operating lease liability               $ 18,000,000.0