Components of Working Capital - Other Current Assets Table (Details) - USD ($) $ in Thousands		Mar. 31, 2020	Dec. 31, 2019
NGLs inventory		$ 469	$ 906
Materials and supplies inventory		50,291	23,444
Imbalance receivables		6,683	4,690
Prepaid insurance		3,785	5,676
Contract assets		12,975	7,129
Other		6,824	93
Total other current assets	[1]	81,027	41,938
WES Operating [Member]
NGLs inventory		469	906
Materials and supplies inventory		50,291	23,444
Imbalance receivables		6,683	4,690
Prepaid insurance		2,082	3,652
Contract assets		12,975	7,129
Other		6,824	93
Total other current assets	[2]	$ 79,324	$ 39,914

[1] 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.

[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.