v3.20.2
Investments in Non-Controlled Entities (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Mar. 31, 2020
Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]            
Proceeds from Sale of Productive Assets     $ 332,872 $ 63,887    
Gain (Loss) on Disposition of Other Assets $ 0 $ 4,646 12,887 26,434    
Revenues 460,408 701,699 1,243,214 1,330,634    
Operating 146,107 168,929 295,615 314,954    
Other operating income (expense) 3,913 (5,024) 3,402 1,917    
Trade accounts receivable 92,884   92,884     $ 125,440
Other accounts receivable 18,761   18,761     23,887
Change in Equity Method Investments [Roll Forward]            
Investments, Beginning Balance     1,240,551      
Additional investment     59,458      
Sale of ownership interest in Saddlehorn     (66,989)      
Proportionate share of earnings     78,265      
Amortization of excess investment and capitalized interest     (916)      
Earnings of non-controlled entities 33,689 40,785 77,349 72,040    
Distributions from operations of non-controlled entities     102,699 83,069    
Investments, Ending Balance 1,207,670   1,207,670      
Service [Member]            
Schedule of Equity Method Investments [Line Items]            
Revenues 411,815 506,405 870,210 967,197    
Equity Method Investee [Member]            
Schedule of Equity Method Investments [Line Items]            
Related Party Transaction, Other Revenues from Transactions with Related Party $ 1,000 1,100 $ 2,200 2,600    
BridgeTex [Member]            
Schedule of Equity Method Investments [Line Items]            
Interest in equity method investment 30.00%   30.00%      
BridgeTex [Member] | Equity Method Investee [Member]            
Schedule of Equity Method Investments [Line Items]            
Trade accounts receivable $ 273   $ 273     392
Other accounts receivable 2,054   2,054     26
Other Accounts Payable 0   0      
BridgeTex [Member] | Equity Method Investee [Member] | Service [Member]            
Schedule of Equity Method Investments [Line Items]            
Revenues $ 12,677 10,181 $ 23,425 20,326    
Double Eagle Pipeline Llc [Member]            
Schedule of Equity Method Investments [Line Items]            
Interest in equity method investment 50.00%   50.00%      
Double Eagle Pipeline Llc [Member] | Equity Method Investee [Member]            
Schedule of Equity Method Investments [Line Items]            
Trade accounts receivable $ 480   $ 480     445
Double Eagle Pipeline Llc [Member] | Equity Method Investee [Member] | Service [Member]            
Schedule of Equity Method Investments [Line Items]            
Revenues $ 1,421 1,572 $ 3,021 3,231    
HoustonLink Pipeline Company LLC [Member]            
Schedule of Equity Method Investments [Line Items]            
Interest in equity method investment 50.00%   50.00%      
HoustonLink Pipeline Company LLC [Member] | Equity Method Investee [Member]            
Schedule of Equity Method Investments [Line Items]            
Trade accounts receivable           60
Powder Springs Logistics, LLC [Member]            
Schedule of Equity Method Investments [Line Items]            
Interest in equity method investment 50.00%   50.00%      
Powder Springs Logistics, LLC [Member] | Equity Method Investee [Member]            
Schedule of Equity Method Investments [Line Items]            
Trade accounts receivable $ 47   $ 47     161
Other accounts receivable 0   0      
Long-term receivables $ 8,219   $ 8,219     6,006
Saddlehorn Pipeline Company [Member]            
Schedule of Equity Method Investments [Line Items]            
Interest in equity method investment 30.00%   30.00%   30.00%  
Equity Method Investment Sold Percentage         10.00%  
Saddlehorn Pipeline Company [Member] | Equity Method Investee [Member]            
Schedule of Equity Method Investments [Line Items]            
Other accounts receivable $ 236   $ 236     126
Saddlehorn Pipeline Company [Member] | Equity Method Investee [Member] | Service [Member]            
Schedule of Equity Method Investments [Line Items]            
Revenues $ 565 551 $ 1,131 1,103    
Seabrook Logistics, LLC [Member]            
Schedule of Equity Method Investments [Line Items]            
Interest in equity method investment 50.00%   50.00%      
Seabrook Logistics, LLC [Member] | Equity Method Investee [Member]            
Schedule of Equity Method Investments [Line Items]            
Operating $ 7,479 6,241 $ 14,378 13,150    
Other operating income (expense) 0 $ 0        
Trade accounts receivable 768   768     941
Other accounts receivable 0   0      
Other Accounts Payable $ 3,976   $ 3,976     1,349
Texas Frontera Llc [Member]            
Schedule of Equity Method Investments [Line Items]            
Interest in equity method investment 50.00%   50.00%      
MVP Terminalling, LLC [Member]            
Schedule of Equity Method Investments [Line Items]            
Interest in equity method investment 50.00%   50.00%      
MVP Terminalling, LLC [Member] | Equity Method Investee [Member]            
Schedule of Equity Method Investments [Line Items]            
Other operating income (expense)     $ 1,410 $ 0    
Other accounts receivable $ 422   422     $ 418
Investment in Saddlehorn JV [Member] | Saddlehorn Pipeline Company [Member]            
Schedule of Equity Method Investments [Line Items]            
Proceeds from Sale of Productive Assets     79,900      
Gain (Loss) on Disposition of Other Assets     $ (12,900)