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Equity Method Investments - Summarized Financial Information (Details) - USD ($)
$ in Thousands
 8 Months Ended 12 Months Ended
Dec. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Red River        
Schedule of Equity Method Investments [Line Items]        
Current assets $ 9,278 $ 9,278    
Non-current assets 381,778 381,778    
Current liabilities 8,291 8,291    
Revenues 38,352      
Gross profit 25,919      
Operating income 25,497      
Net Income 25,548      
Joint Ventures        
Schedule of Equity Method Investments [Line Items]        
Current assets 29,476 29,476 $ 15,450  
Non-current assets 262,300 262,300 240,852  
Current liabilities 6,391 6,391 4,362  
Non-current liabilities $ 8 8 0  
Revenues   48,703 35,050 $ 28,805
Gross profit   30,473 17,690 13,344
Operating income   28,503 12,909 10,920
Net Income   $ 28,601 $ 15,701 $ 10,714