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Equity Method Investments - Summarized Financial Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]          
Current Assets $ 26,588   $ 26,588   $ 29,309
Current liabilities 88,044   88,044   28,300
Revenues 189,627 $ 142,268 511,018 $ 423,306  
Operating income 50,583 51,765 141,147 134,688  
Net Income 43,624 46,328 123,137 118,539  
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] | Red River          
Schedule of Equity Method Investments [Line Items]          
Current Assets 25,444   25,444   13,488
Non-current Assets 406,051   406,051   413,259
Current liabilities 11,786   11,786   7,789
Revenues 19,349 13,919 46,136 35,888  
Gross Profit 12,027 8,189 26,367 21,251  
Operating income 11,871 8,020 25,866 20,717  
Net Income 11,853 8,022 25,843 20,768  
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] | Joint Ventures [Member]          
Schedule of Equity Method Investments [Line Items]          
Current Assets 20,790   20,790   20,763
Non-current Assets 245,560   245,560   253,862
Current liabilities 3,731   3,731   $ 1,496
Revenues 12,090 14,227 35,316 42,412  
Gross Profit 6,757 9,634 20,462 28,468  
Operating income 6,300 9,135 19,022 26,999  
Net Income $ 6,300 $ 9,136 $ 19,023 $ 27,023