Consolidated Statements of Operations - WES Operating (Parenthetical) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cost of product	[1]	$ 444,247	$ 415,505	$ 953,792
Operation and maintenance	[1]	641,219	480,861	345,617
General and administrative	[1]	114,591	67,195	53,949
Interest expense	[2]	(303,286)	(183,831)	(142,520)
Affiliates [Member]
Cost of product		254,771	168,535	74,560
Operation and maintenance		146,990	115,948	82,249
General and administrative		101,485	49,672	43,221
Interest expense		(1,970)	(6,746)	(224)
WES Operating [Member]
Cost of product	[3]	444,247	415,505	953,792
Operation and maintenance	[3]	641,219	480,861	345,617
General and administrative	[3]	107,772	63,166	51,077
Interest expense	[4]	(303,041)	(181,796)	(140,291)
WES Operating [Member] | Affiliates [Member]
Cost of product		254,800	168,500	74,600
Operation and maintenance		147,000	115,900	82,200
General and administrative		99,613	48,819	42,411
Interest expense		$ (2,000)	$ (6,700)	$ (200)

[1] Cost of product includes product purchases from affiliates (as defined in Note 1) of $254.8 million, $168.5 million, and $74.6 million for the years ended December 31, 2019, 2018, and 2017, respectively. Operation and maintenance includes charges from affiliates of $147.0 million, $115.9 million, and $82.2 million for the years ended December 31, 2019, 2018, and 2017, respectively. General and administrative includes charges from affiliates of $101.5 million, $49.7 million, and $43.2 million for the years ended December 31, 2019, 2018, and 2017, respectively. See Note 6.

[2] Includes affiliate amounts of $(2.0) million, $(6.7) million, and $(0.2) million for the years ended December 31, 2019, 2018, and 2017, respectively. See Note 1 and Note 13.

[3] Cost of product includes product purchases from affiliates (as defined in Note 1) of $254.8 million, $168.5 million, and $74.6 million for the years ended December 31, 2019, 2018, and 2017, respectively. Operation and maintenance includes charges from affiliates of $147.0 million, $115.9 million, and $82.2 million for the years ended December 31, 2019, 2018, and 2017, respectively. General and administrative includes charges from affiliates of $99.6 million, $48.8 million, and $42.4 million for the years ended December 31, 2019, 2018, and 2017, respectively. See Note 6.

[4] Includes affiliate amounts of $(2.0) million, $(6.7) million, and $(0.2) million for the years ended December 31, 2019, 2018, and 2017, respectively. See Note 1 and Note 13.