Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands		Dec. 31, 2020	Dec. 31, 2019
Materials and supplies inventory		$ 71,900
Total assets	[1]	11,830,027	$ 12,346,453
Accounts receivable, net		452,880	260,512
Total liabilities	[2]	8,934,815	9,001,160
Related Parties [Member]
Total assets		1,572,526	1,724,265
Accounts receivable, net		291,253	113,345
Total liabilities		164,655	108,760
Natural-Gas Liquids [Member]
NGLs line-fill inventory		$ 4,200	$ 4,500

[1] Total assets includes related-party amounts of $1.6 billion and $1.7 billion as of December 31, 2020 and 2019, respectively, which includes related-party Accounts receivable, net of $291.3 million and $113.3 million as of December 31, 2020 and 2019, respectively. See Note 6.

[2] Total liabilities includes related-party amounts of $164.7 million and $108.8 million as of December 31, 2020 and 2019, respectively. See Note 6.