v3.19.3
Investments in Non-Controlled Entities (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]          
Revenues $ 656,596 $ 638,020 $ 1,987,230 $ 1,960,890  
Operating 169,387 172,115 484,341 475,256  
Cost of product sales 108,757 120,510 430,727 473,781  
Other operating income (expense) (379) 0 1,538 0  
Trade accounts receivable 131,746   131,746   $ 104,164
Other accounts receivable 22,379   22,379   25,007
Long-term receivables 20,789   20,789   20,844
Change in Equity Method Investments [Roll Forward]          
Investments at December 31, 2018     1,076,306    
Additional investment     158,145    
Indemnification settlement     (5,000)    
Proportionate share of earnings     123,621    
Amortization of excess investment and capitalized interest     (1,392)    
Earnings of non-controlled entities 50,189 53,795 122,229 130,843  
Distributions from operations of non-controlled entities     138,140 147,950  
Distributions from returns of investments in non-controlled entities     7,500 1,786  
Investments at June 30, 2019 1,206,040   1,206,040    
Service [Member]          
Schedule of Equity Method Investments [Line Items]          
Revenues 506,432 488,775 1,473,629 1,392,960  
Product [Member]          
Schedule of Equity Method Investments [Line Items]          
Revenues 144,807 144,403 497,791 552,792  
Equity Method Investee [Member]          
Schedule of Equity Method Investments [Line Items]          
Related Party Transaction, Other Revenues from Transactions with Related Party $ 1,200 900 $ 3,800 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 $ 385   $ 385   318
Other accounts receivable 31   31   1,549
Other Accounts Payable 530   530    
BridgeTex [Member] | Equity Method Investee [Member] | Service [Member]          
Schedule of Equity Method Investments [Line Items]          
Revenues $ 10,737 9,958 $ 31,063 29,519  
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 $ 440   $ 440   546
Double Eagle Pipeline Llc [Member] | Equity Method Investee [Member] | Service [Member]          
Schedule of Equity Method Investments [Line Items]          
Revenues $ 1,582 1,005 $ 4,813 3,892  
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 $ 77   $ 77    
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) $ 289 0 $ 289 0  
Other accounts receivable $ 364   $ 364   397
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]          
Cost of product sales $ 0 0 $ 0 410  
Other accounts receivable 10   10    
Long-term receivables 4,892   4,892   2,221
Powder Springs Logistics, LLC [Member] | Equity Method Investee [Member] | Product [Member]          
Schedule of Equity Method Investments [Line Items]          
Revenues $ 0 0 $ 0 4,899  
Saddlehorn Pipeline Company [Member]          
Schedule of Equity Method Investments [Line Items]          
Interest in equity method investment 40.00%   40.00%    
Saddlehorn Pipeline Company [Member] | Equity Method Investee [Member]          
Schedule of Equity Method Investments [Line Items]          
Other accounts receivable $ 120   $ 120   183
Saddlehorn Pipeline Company [Member] | Equity Method Investee [Member] | Service [Member]          
Schedule of Equity Method Investments [Line Items]          
Revenues $ 566 552 $ 1,669 1,628  
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 $ 6,267 $ 3,982 $ 19,417 $ 3,982  
Trade accounts receivable 753   753    
Other accounts receivable 332   332    
Other Accounts Payable $ 1,223   $ 1,223   $ 1,140
Texas Frontera Llc [Member]          
Schedule of Equity Method Investments [Line Items]          
Interest in equity method investment 50.00%   50.00%