Revenue from Contracts with Customers - Revenue From Contracts With Customers Table (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Revenue from customers		$ 2,547,608	$ 2,745,373	$ 2,305,408
Revenue from other than customers, other		1,341	1,468	2,125
Total revenues and other	[1]	2,772,592	2,746,174	2,299,658
Service Revenues - Fee Based [Member]
Disaggregation of Revenue [Line Items]
Revenue from customers		2,360,680	2,388,191	1,905,728
Total revenues and other		2,584,323	2,388,191	1,905,728
Service Revenues - Product Based [Member]
Disaggregation of Revenue [Line Items]
Revenue from customers		48,369	70,127	88,785
Total revenues and other		48,369	70,127	88,785
Product Sales [Member]
Disaggregation of Revenue [Line Items]
Revenue from customers		138,559	287,055	310,895
Total revenues and other		138,559	286,388	303,020
Lease Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from other than customers		223,643	0	0
Commodity-Price Swap Agreements [Member]
Disaggregation of Revenue [Line Items]
Revenue from other than customers		$ 0	$ (667)	$ (7,875)

[1] Total revenues and other includes related-party amounts of $1.8 billion, $1.6 billion, and $1.4 billion for the years ended December 31, 2020, 2019, and 2018, respectively. See Note 6.