Consolidated Statements of Cash Flows - WES Operating (Parenthetical) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Borrowings, net of debt issuance costs	[1]	$ 2,430,750	$ 1,444,082	[2]
Repayments of debt	[3]	467,595	630,000	[2]
WES Operating [Member]
Borrowings, net of debt issuance costs	[4]	2,430,750	1,444,090	[2]
Repayments of debt	[5]	439,595	630,000	[2]
Affiliates [Member]
Borrowings, net of debt issuance costs		11,000	106,600
Repayments of debt		439,600
Affiliates [Member] | WES Operating [Member]
Borrowings, net of debt issuance costs		11,000	$ 106,600
Repayments of debt		$ 439,600

[1] For the three months ended March 31, 2019 and 2018, includes $11.0 million and $106.6 million of borrowings, respectively, under the APCWH Note Payable.

[2] Financial information has been recast to include the financial position and results attributable to AMA. See Note 1 and Note 3.

[3] For the three months ended March 31, 2019, includes a $439.6 million repayment to settle the APCWH Note Payable. See Note 6.

[4] For the three months ended March 31, 2019 and 2018, includes $11.0 million and $106.6 million of borrowings, respectively, under the APCWH Note Payable.

[5] For the three months ended March 31, 2019, includes a $439.6 million repayment to settle the APCWH Note Payable. See Note 6.