v3.22.1
Equity Investments - Equity Investments Table (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Schedule of Equity Method Investments [Line Items]    
Balance at beginning of year $ 1,167,187  
Equity income, net 49,607 $ 52,165
Contributions 2,070 86
Distributions (45,870) (49,048)
Distributions in excess of cumulative earnings (9,925) $ (12,141)
Balance at end of period 1,163,069  
White Cliffs [Member]    
Schedule of Equity Method Investments [Line Items]    
Balance at beginning of year 40,753  
Equity income, net 231  
Contributions 0  
Distributions (86)  
Distributions in excess of cumulative earnings (899)  
Balance at end of period 39,999  
Rendezvous [Member]    
Schedule of Equity Method Investments [Line Items]    
Balance at beginning of year 22,075  
Equity income, net (703)  
Contributions 0  
Distributions (112)  
Distributions in excess of cumulative earnings (651)  
Balance at end of period 20,609  
Mont Belvieu JV [Member]    
Schedule of Equity Method Investments [Line Items]    
Balance at beginning of year 96,728  
Equity income, net 7,891  
Contributions 0  
Distributions (7,986)  
Distributions in excess of cumulative earnings (1,907)  
Balance at end of period 94,726  
Texas Express Gathering [Member]    
Schedule of Equity Method Investments [Line Items]    
Balance at beginning of year 16,116  
Equity income, net 1,482  
Contributions 0  
Distributions (1,363)  
Distributions in excess of cumulative earnings 0  
Balance at end of period 16,235  
Texas Express Pipeline [Member]    
Schedule of Equity Method Investments [Line Items]    
Balance at beginning of year 188,925  
Equity income, net 10,086  
Contributions 0  
Distributions (10,149)  
Distributions in excess of cumulative earnings (882)  
Balance at end of period 187,980  
Front Range Pipeline [Member]    
Schedule of Equity Method Investments [Line Items]    
Balance at beginning of year 196,632  
Equity income, net 9,997  
Contributions 0  
Distributions (10,220)  
Distributions in excess of cumulative earnings (1,304)  
Balance at end of period 195,105  
Whitethorn LLC [Member]    
Schedule of Equity Method Investments [Line Items]    
Balance at beginning of year 149,690  
Equity income, net 260  
Contributions 255  
Distributions 2,575  
Distributions in excess of cumulative earnings (882)  
Balance at end of period 151,898  
Cactus II [Member]    
Schedule of Equity Method Investments [Line Items]    
Balance at beginning of year 171,294  
Equity income, net 3,575  
Contributions 0  
Distributions (3,617)  
Distributions in excess of cumulative earnings (2,412)  
Balance at end of period 168,840  
Saddlehorn [Member]    
Schedule of Equity Method Investments [Line Items]    
Balance at beginning of year 110,441  
Equity income, net 5,471  
Contributions 0  
Distributions (5,354)  
Distributions in excess of cumulative earnings (180)  
Balance at end of period 110,378  
Panola [Member]    
Schedule of Equity Method Investments [Line Items]    
Balance at beginning of year 20,044  
Equity income, net 571  
Contributions 0  
Distributions (571)  
Distributions in excess of cumulative earnings (171)  
Balance at end of period 19,873  
Mi Vida [Member]    
Schedule of Equity Method Investments [Line Items]    
Balance at beginning of year 51,763  
Equity income, net 4,218  
Contributions 0  
Distributions (3,823)  
Distributions in excess of cumulative earnings 0  
Balance at end of period 52,158  
Ranch Westex [Member]    
Schedule of Equity Method Investments [Line Items]    
Balance at beginning of year 979  
Equity income, net 3,862  
Contributions 0  
Distributions (2,498)  
Distributions in excess of cumulative earnings 0  
Balance at end of period 2,343  
Red Bluff Express [Member]    
Schedule of Equity Method Investments [Line Items]    
Balance at beginning of year 101,747  
Equity income, net 2,666  
Contributions 1,815  
Distributions (2,666)  
Distributions in excess of cumulative earnings (637)  
Balance at end of period $ 102,925