Investments in Non-Controlled Entities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Proceeds from Sale of Productive Assets	$ 332,789	$ 53,676
Gain (Loss) on Disposition of Other Assets	12,887	21,788
Revenues	782,806	628,935
Operating	149,508	146,025
Other operating income (expense)	(511)	6,941
Trade accounts receivable	94,563		$ 125,440
Other accounts receivable	20,478		23,887
Change in Equity Method Investments [Roll Forward]
Investments, Beginning Balance	1,240,551
Additional investment	28,325
Sale of ownership interest in Saddlehorn	(66,990)
Proportionate share of earnings	44,118
Amortization of excess investment and capitalized interest	(458)
Earnings of non-controlled entities	43,660	31,255
Distributions from operations of non-controlled entities	54,743	43,069
Investments, Ending Balance	1,190,803
Service [Member]
Schedule of Equity Method Investments [Line Items]
Revenues	458,395	460,792
Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Related Party Transaction, Other Revenues from Transactions with Related Party	$ 1,200	1,500
BridgeTex [Member]
Schedule of Equity Method Investments [Line Items]
Interest in equity method investment	30.00%
BridgeTex [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Related Party Transaction, Amounts of Transaction	$ 1,100
Trade accounts receivable	366		392
Other accounts receivable	17		26
Other Accounts Payable	0
BridgeTex [Member] | Equity Method Investee [Member] | Service [Member]
Schedule of Equity Method Investments [Line Items]
Revenues	$ 10,748	10,145
Double Eagle Pipeline Llc [Member]
Schedule of Equity Method Investments [Line Items]
Interest in equity method investment	50.00%
Double Eagle Pipeline Llc [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Trade accounts receivable	$ 592		445
Double Eagle Pipeline Llc [Member] | Equity Method Investee [Member] | Service [Member]
Schedule of Equity Method Investments [Line Items]
Revenues	$ 1,600	1,659
HoustonLink Pipeline Company LLC [Member]
Schedule of Equity Method Investments [Line Items]
Interest in equity method investment	50.00%
HoustonLink Pipeline Company LLC [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Trade accounts receivable	$ 24		60
MVP Terminalling, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Interest in equity method investment	50.00%
MVP Terminalling, LLC [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Other accounts receivable	$ 690		418
Powder Springs Logistics, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Interest in equity method investment	50.00%
Powder Springs Logistics, LLC [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Trade accounts receivable	$ 307		161
Other accounts receivable	310
Long-term receivables	$ 7,330		6,006
Saddlehorn Pipeline Company [Member]
Schedule of Equity Method Investments [Line Items]
Interest in equity method investment	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	$ 126		126
Saddlehorn Pipeline Company [Member] | Equity Method Investee [Member] | Service [Member]
Schedule of Equity Method Investments [Line Items]
Revenues	$ 566	552
Seabrook Logistics, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Interest in equity method investment	50.00%
Seabrook Logistics, LLC [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Operating	$ 6,899	6,909
Other operating income (expense)	1,410	$ 0
Trade accounts receivable	1,216		941
Other accounts receivable	0
Other Accounts Payable	$ 1,695		$ 1,349
Texas Frontera Llc [Member]
Schedule of Equity Method Investments [Line Items]
Interest in equity method investment	50.00%
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)