Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Revenues
Total revenues	$ 278,001		$ 234,734	[1]	$ 762,874		$ 679,720	[1]
Operating expenses
Cost of product	93,516	[2]	89,107	[1],[2]	270,059	[2]	254,719	[1],[2]
Operation and maintenance	42,757	[2]	35,493	[1],[2]	121,165	[2]	103,304	[1],[2]
General and administrative	7,962	[2]	15,039	[1],[2]	25,100	[2]	35,623	[1],[2]
Property and other taxes	6,649		5,328	[1]	18,520		14,998	[1]
Depreciation, amortization and impairments	37,615		28,455	[1]	106,551		83,263	[1]
Total operating expenses	188,499		173,422	[1]	541,395		491,907	[1]
Operating income	89,502		61,312	[1]	221,479		187,813	[1]
Interest income, net - affiliates	4,225		4,225	[1]	12,675		12,675	[1]
Interest expense	(13,018)	[3]	(10,977)	[1],[3]	(37,483)	[3]	(30,118)	[1],[3]
Other income (expense), net	466		522	[1]	1,686		(287)	[1]
Income before income taxes	81,175		55,082	[1]	198,357		170,083	[1]
Income tax expense	58		14,166		4,431		43,790
Net income	81,117		40,916	[1]	193,926		126,293	[1]
Net income (loss) attributable to noncontrolling interest	36,779		21,605	[1]	82,562		71,258	[1]
Net income attributable to Western Gas Equity Partners, LP	44,338		19,311	[1]	111,364		55,035	[1]
Limited partners' interest in net income:
Pre-acquisition net (income) loss allocated to Anadarko	0				(4,637)
Limited partners' interest in net income	44,338	[4]			106,727	[4]
Affiliated Entity [Member]
Revenues
Gathering, processing and transportation of natural gas and natural gas liquids	83,606		61,388	[1]	218,680		182,448	[1]
Natural gas, natural gas liquids and condensate sales	129,411		115,132	[1]	371,077		324,793	[1]
Equity income and other, net	4,607		4,085	[1]	13,457		12,219	[1]
Total revenues	217,624	[5]	180,605	[1],[5]	603,214	[5]	519,460	[1],[5]
Operating expenses
Cost of product	33,753	[5]	42,839	[5]	97,801	[5]	115,603	[5]
Operation and maintenance	13,469	[6]	12,638	[6]	41,021	[6]	38,040	[6]
General and administrative	6,090	[7]	14,227	[7]	17,981	[7]	30,811	[7]
Total operating expenses	53,312		69,704		156,803		184,454
Interest expense	0	[8]	(81)	[8]	0	[8]	(2,684)	[8]
Third Parties [Member]
Revenues
Gathering, processing and transportation of natural gas and natural gas liquids	47,175		32,545	[1]	124,791		96,518	[1]
Natural gas, natural gas liquids and condensate sales	11,915		20,974	[1]	31,539		62,025	[1]
Equity income and other, net	1,287		610	[1]	3,330		1,717	[1]
Total revenues	60,377		54,129	[1]	159,660		160,260	[1]
Operating expenses
Interest expense	$ (13,018)		$ (10,896)		$ (37,483)		$ (27,434)
Limited Partner [Member] | Common Units [Member]
Limited partners' interest in net income:
Net income per common unit - basic and diluted	$ 0.20				$ 0.49
Weighted average common units outstanding - basic and diluted	218,896,000				218,896,000

[1] Financial information has been recast to include the financial position and results attributable to the Non-Operated Marcellus Interest. See Note 2.

[2] Cost of product includes product purchases from Anadarko (as defined in Note 1) of $33.8 million and $97.8 million for the three and nine months ended September 30, 2013, respectively, and $42.8 million and $115.6 million for the three and nine months ended September 30, 2012, respectively. Operation and maintenance includes charges from Anadarko of $13.5 million and $41.0 million for the three and nine months ended September 30, 2013, respectively, and $12.6 million and $38.0 million for the three and nine months ended September 30, 2012, respectively. General and administrative includes charges from Anadarko of $6.1 million and $18.0 million for the three and nine months ended September 30, 2013, respectively, and $14.2 million and $30.8 million for the three and nine months ended September 30, 2012, respectively. See Note 5.

[3] Includes affiliate (as defined in Note 1) interest expense of zero for the three and nine months ended September 30, 2013, and $0.1 million and $2.7 million for the three and nine months ended September 30, 2012, respectively. See Note 8.

[4] Represents net income for periods including and subsequent to the acquisition of WES assets (as defined in Note 1). See Note 4.

[5] Represents amounts recognized under gathering, treating or processing agreements, and purchase and sale agreements.

[6] 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.

[7] Represents general and administrative expense incurred on and subsequent to the date of WES’s 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 by Anadarko (see Equity incentive plan and Anadarko incentive plans within this Note 5) and amounts charged by Anadarko under the WGP omnibus agreement.

[8] For the three and nine months ended September 30, 2012, includes interest expense recognized on the WES note payable to Anadarko (see Note 8) and interest imputed on the reimbursement payable to Anadarko for certain expenditures Anadarko incurred in 2011 related to the construction of the Brasada and Lancaster plants. WES repaid the WES note payable to Anadarko in June 2012, and repaid the reimbursement payable to Anadarko related to the construction of the Brasada and Lancaster plants in the fourth quarter of 2012. See Note receivable from and amounts payable to Anadarko within this Note 5.