Consolidated Statements of Cash Flows - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities
Net income (loss)		$ (289,400)	$ 211,979
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization		132,319	113,946
Long-lived asset impairments		155,785	390
Goodwill impairment		441,017	0
Non-cash equity-based compensation expense		5,234	2,368
Deferred income taxes		(2,168)	4,065
Accretion and amortization of long-term obligations, net		2,100	1,511
Equity income, net – related parties		(61,347)	(57,992)
Distributions from equity-investment earnings – related parties		60,868	54,221
(Gain) loss on divestiture and other, net		40	590
(Gain) loss on early extinguishment of debt		(7,345)	0
(Gain) loss on interest-rate swaps		0	35,638
Other		2,287	7
Changes in assets and liabilities:
(Increase) decrease in accounts receivable, net		7,702	9,486
Increase (decrease) in accounts and imbalance payables and accrued liabilities, net		(28,924)	(55,529)
Change in other items, net		(24,857)	22,393
Net cash provided by operating activities		393,311	343,073
Cash flows from investing activities
Capital expenditures		(172,816)	(386,144)
Contributions to equity investments - related parties		(10,960)	(36,543)
Distributions from equity investments in excess of cumulative earnings – related parties		5,052	7,792
Proceeds from the sale of assets to third parties		0	(33)
Net cash used in investing activities		(178,724)	(2,515,732)
Cash flows from financing activities
Borrowings, net of debt issuance costs	[1]	3,586,173	2,430,750
Repayments of debt	[2]	(3,470,139)	(467,595)
Increase (decrease) in outstanding checks		(7,308)	(5,890)
Registration expenses related to the issuance of Partnership common units		0	(855)
Distributions to Partnership unitholders	[3]	(281,786)	(131,910)
Net contributions from (distributions to) related parties		20,489	451,591
Above-market component of swap agreements with Anadarko	[3]	0	7,407
Finance lease payments		(2,151)	0
Net cash provided by (used in) financing activities		(162,267)	2,180,564
Net increase (decrease) in cash and cash equivalents		52,320	7,905
Cash and cash equivalents at beginning of period		99,962	92,142
Cash and cash equivalents at end of period		152,282	100,047
Supplemental disclosures
Interest paid, net of capitalized interest		75,844	76,871
Taxes paid (reimbursements received)		(384)	96
Accrued capital expenditures		120,233	203,509
Chipeta [Member]
Cash flows from financing activities
Distributions to Chipeta noncontrolling interest owner		(1,738)	(1,935)
WES Operating [Member]
Cash flows from financing activities
Distributions to noncontrolling interest owners of WES Operating		(5,807)	(100,999)
Affiliates [Member]
Cash flows from investing activities
Acquisitions		0	(2,007,501)
Cash flows from financing activities
Borrowings, net of debt issuance costs			11,000
Repayments of debt			(439,600)
Distributions to Partnership unitholders		(150,609)	(102,654)
Affiliates [Member] | WES Operating [Member]
Cash flows from financing activities
Distributions to Partnership unitholders		(5,807)	(2,543)
Third Parties [Member]
Cash flows from investing activities
Acquisitions		$ 0	$ (93,303)

[1] For the three months ended March 31, 2019, includes an $11.0 million borrowing under the APCWH Note Payable.

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

[3] See Note 6.