Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Revenues and Other
Product sales		$ 75,937
Total revenues and other		437,168	$ 516,193
Equity income, net – affiliates	[1]	20,424	19,461
Operating expenses
Cost of product	[2]	77,799	189,359
Operation and maintenance	[2]	88,279	73,760
General and administrative	[2]	14,964	13,476
Property and other taxes		12,382	12,294
Depreciation and amortization		76,842	69,702
Impairments		148	164,742
Total operating expenses		270,414	523,333
Gain (loss) on divestiture and other, net	[3],[4]	116	119,487
Proceeds from business interruption insurance claims		0	5,767
Operating income (loss)		187,294	137,575
Interest income – affiliates	[5]	4,225	4,225
Interest expense	[6]	(40,346)	(36,033)
Other income (expense), net		817	446
Income (loss) before income taxes		151,990	106,213
Income tax (benefit) expense		1,502	3,552
Net income (loss)		150,488	102,661
Net income (loss) attributable to noncontrolling interests		49,483	26,721
Net income (loss) attributable to Western Gas Equity Partners, LP		101,005	75,940
Fee Based [Member]
Revenues and Other
Service revenues - fee and product based		338,419
Product Based [Member]
Revenues and Other
Service revenues - fee and product based		22,593
Affiliates [Member]
Revenues and Other
Product sales		54,819	142,841
Total revenues and other	[1]	241,062	315,155
Operating expenses
Cost of product	[1]	20,244	15,988
Operation and maintenance	[7]	20,248	17,089
General and administrative	[8]	11,823	9,734
Total operating expenses		52,315	42,811
Interest expense	[9]	0	(71)
Affiliates [Member] | Fee Based [Member]
Revenues and Other
Service revenues - fee and product based		186,001	172,314
Affiliates [Member] | Product Based [Member]
Revenues and Other
Service revenues - fee and product based		242	0
Third Parties [Member]
Revenues and Other
Product sales		21,118	63,684
Other		219	1,854
Total revenues and other		196,106	201,038
Operating expenses
Interest expense		(40,346)	(35,962)
Third Parties [Member] | Fee Based [Member]
Revenues and Other
Service revenues - fee and product based		152,418	135,500
Third Parties [Member] | Product Based [Member]
Revenues and Other
Service revenues - fee and product based		$ 22,351	$ 0
Limited Partner [Member]
Limited partners' interest in net income (loss):
Net income (loss) per common unit - basic and diluted		$ 0.46	$ 0.35
Weighted-average common units outstanding - basic and diluted		218,933	218,929

[1] Represents amounts earned or incurred on and subsequent to the date of the acquisition of WES assets, as well as amounts earned or incurred by Anadarko on a historical basis related to WES assets prior to the acquisition of such assets by WES, recognized under gathering, treating or processing agreements, and purchase and sale agreements.

[2] Cost of product includes product purchases from Anadarko (as defined in Note 1) of $20.2 million and $16.0 million for the three months ended March 31, 2018 and 2017, respectively. Operation and maintenance includes charges from Anadarko of $20.2 million and $17.1 million for the three months ended March 31, 2018 and 2017, respectively. General and administrative includes charges from Anadarko of $11.8 million and $9.7 million for the three months ended March 31, 2018 and 2017, respectively. See Note 6.

[3] Includes losses related to an incident at the DBM complex for the three months ended March 31, 2017. See Note 1.

[4] Includes losses related to an incident at the DBM complex for the three months ended March 31, 2017. See Note 1.

[5] Represents interest income recognized on the note receivable from Anadarko.

[6] Includes affiliate (as defined in Note 1) amounts of zero and $(0.1) million for the three months ended March 31, 2018 and 2017, respectively. See Note 10.

[7] Represents expenses incurred on and subsequent to the date of the acquisition of WES assets, as well as expenses incurred by Anadarko on a historical basis related to WES assets prior to the acquisition of such assets by WES.

[8] Represents general and administrative expense incurred on and subsequent to the date of the acquisition of WES assets, as well as a management services fee for reimbursement of expenses incurred by Anadarko for periods prior to the acquisition of WES assets by WES. These amounts include equity-based compensation expense allocated to WES and WGP by Anadarko (see WES LTIP and Anadarko Incentive Plan within this Note 6) and amounts charged by Anadarko under the WGP and WES omnibus agreements.

[9] Includes amounts related to the Deferred purchase price obligation - Anadarko (see Note 3 and Note 10).