Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands		Mar. 31, 2020	Dec. 31, 2019
Common units issued		443,971,409	443,971,409
Common units outstanding		443,971,409	443,971,409
General partner units issued		9,060,641	9,060,641
General partner units outstanding		9,060,641	9,060,641
Accounts receivable, net	[1]	$ 257,239	$ 260,512
Other current assets	[2]	81,027	41,938
Other assets	[3]	76,465	78,202
Accrued liabilities	[4]	166,738	149,793
Other liabilities	[5]	222,042	208,346
Natural-Gas Liquids [Member]
NGLs line fill inventory		2,000	4,500
Affiliates [Member]
Accounts receivable, net		124,900	113,300
Other current assets		9,000	5,000
Allowance for expected credit loss		2,100
Other assets		59,700	60,200
Finance leases - Short-term debt		2,600	7,900
Accrued liabilities		2,500	3,100
Other liabilities		$ 107,800	$ 97,800

[1] Accounts receivable, net includes amounts receivable from related parties (as defined in Note 1) of $124.9 million and $113.3 million as of March 31, 2020, and December 31, 2019, respectively.

[2] Other current assets includes related-party amounts of $9.0 million and $5.0 million as of March 31, 2020, and December 31, 2019, respectively.

[3] Other assets includes related-party amounts of $59.7 million and $60.2 million as of March 31, 2020, and December 31, 2019, respectively. Other assets also includes $2.0 million and $4.5 million of NGLs line fill as of March 31, 2020, and December 31, 2019, respectively.

[4] Accrued liabilities includes related-party amounts of $2.5 million and $3.1 million as of March 31, 2020, and December 31, 2019, respectively.

[5] Other liabilities includes related-party amounts of $107.8 million and $97.8 million as of March 31, 2020, and December 31, 2019, respectively.