Consolidated Statements of Income - USD ($) $ in Thousands		3 Months Ended				9 Months Ended
		Sep. 30, 2015		Sep. 30, 2014		Sep. 30, 2015		Sep. 30, 2014
Revenues and Other
Total revenues and other		$ 385,101		$ 357,521	[1]	$ 1,190,082		$ 1,016,151	[1]
Equity income, net	[2],[3]	21,976		19,063	[1]	59,137	[4]	41,322	[1],[4]
Operating expenses
Cost of product	[5]	127,721		113,217	[1]	414,378		330,926	[1]
Operation and maintenance	[5]	80,633		67,489	[1]	218,640		184,023	[1]
General and administrative	[5]	9,318		8,339	[1]	28,497		25,688	[1]
Property and other taxes		8,343		6,793	[1]	25,641		21,343	[1]
Depreciation and amortization		60,160	[6]	46,379	[1]	183,715	[6],[7]	132,236	[1]
Impairments		2,337	[6]	898	[1]	276,229	[6],[7]	2,431	[1]
Total operating expenses		288,512		243,115	[1]	1,147,100		696,647	[1]
Gain on divestiture, net		77,244		0	[1]	77,244		0	[1]
Operating income (loss)		195,809		133,469	[1]	179,363		360,826	[1]
Interest income - affiliates	[8]	4,225		4,225	[1]	12,675		12,675	[1]
Interest expense	[9]	(31,773)		(20,878)	[1]	(82,337)		(55,703)	[1]
Other income (expense), net		85		97	[1]	227		788	[1]
Income (loss) before income taxes		168,346		116,913	[1]	109,928		318,586	[1]
Income tax (benefit) expense		1,869		3,891	[1]	3,575		8,199	[1]
Net income (loss)		166,477		113,022	[1]	106,353		310,387	[1]
Net income attributable to noncontrolling interest		2,188		3,863	[1]	8,230		11,005	[1]
Net income (loss) attributable to Western Gas Partners, LP		164,289		109,159	[1]	98,123		299,382	[1]
Limited partners' interest in net income (loss):
Pre-acquisition net (income) loss allocated to Anadarko		0		(6,482)	[1]	(1,742)		(13,282)	[1]
General partner interest in net (income) loss	[10]	(50,267)		(31,058)	[1]	(133,415)		(83,939)	[1]
Limited partners' interest in net income (loss)	[10]	$ 114,022		$ 71,619	[1]	$ (37,034)		$ 202,161	[1]
Net income (loss) per common unit - basic	[11]	$ 0.79		$ 0.60	[1]	$ (0.35)		$ 1.71	[1]
Net income (loss) per common unit - diluted	[11],[12]	$ 0.79		$ 0.60	[1]	$ (0.35)		$ 1.71	[1]
Affiliates [Member]
Revenues and Other
Gathering, processing and transportation of natural gas and natural gas liquids		$ 141,556		$ 124,829	[1]	$ 431,182		$ 340,775	[1]
Natural gas, natural gas liquids and drip condensate sales		105,032		142,025	[1]	345,385		424,207	[1]
Other		870		2,778	[1]	1,172		4,349	[1]
Total revenues and other	[3]	247,458		269,632	[1]	777,739		769,331	[1]
Operating expenses
Cost of product	[3]	35,673		27,034		132,663		85,071
Operation and maintenance	[13]	17,662		15,583		50,534		44,961
General and administrative	[14]	7,671		7,016		22,556		21,243
Total operating expenses		61,006		49,633		205,753		151,275
Interest expense	[15]	(4,310)		0		(9,920)		0
Third Parties [Member]
Revenues and Other
Gathering, processing and transportation of natural gas and natural gas liquids		94,082		70,996	[1]	267,566		201,985	[1]
Natural gas, natural gas liquids and drip condensate sales		41,968		11,647	[1]	141,489		37,533	[1]
Other		1,593		5,246	[1]	3,288		7,302	[1]
Total revenues and other		137,643		87,889	[1]	412,343		246,820	[1]
Operating expenses
Interest expense		$ (27,463)		$ (20,878)		$ (72,417)		$ (55,703)

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

[2] Income earned from equity investments is classified as affiliate. See Note 1.

[3] Represents amounts earned or incurred on and subsequent to the date of acquisition of the Partnership assets, as well as amounts earned or incurred by Anadarko on a historical basis related to the Partnership assets prior to the acquisition of such assets, recognized under gathering, treating or processing agreements, and purchase and sale agreements. See Adjustments to Previously Issued Financial Statements in Note 1.

[4] Income earned on, distributions from and contributions to equity investments are classified as affiliate. See Note 1.

[5] Cost of product includes product purchases from Anadarko (as defined in Note 1) of $35.7 million and $132.7 million for the three and nine months ended September 30, 2015, respectively, and $27.0 million and $85.1 million for the three and nine months ended September 30, 2014, respectively. Operation and maintenance includes charges from Anadarko of $17.7 million and $50.5 million for the three and nine months ended September 30, 2015, respectively, and $15.6 million and $45.0 million for the three and nine months ended September 30, 2014, respectively. General and administrative includes charges from Anadarko of $7.7 million and $22.6 million for the three and nine months ended September 30, 2015, respectively, and $7.0 million and $21.2 million for the three and nine months ended September 30, 2014, respectively. See Note 5.

[6] “As Reported” amounts previously included as a component of Depreciation, amortization and impairments in the Partnership’s Original Filing.

[7] “As Reported” amounts previously included as a component of Depreciation, amortization and impairments in the Partnership’s Original Filing.

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

[9] Includes affiliate (as defined in Note 1) interest expense of $4.3 million and $9.9 million for the three and nine months ended September 30, 2015, respectively, and zero for each of the three and nine months ended September 30, 2014. See Note 2 and Note 9.

[10] Represents net income (loss) earned on and subsequent to the date of acquisition of the Partnership assets (as defined in Note 1). See Note 4.

[11] See Note 4 for the calculation of net income (loss) per unit.

[12] Inclusion of Class C units in the calculation would have had an anti-dilutive effect.

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

[14] Represents general and administrative expense incurred on and subsequent to the date of the Partnership’s acquisition of the Partnership assets, as well as a management services fee for reimbursement of expenses incurred by Anadarko for periods prior to the acquisition of the Partnership assets by the Partnership. These amounts include equity-based compensation expense allocated to the Partnership by Anadarko (see WES LTIP and WGP LTIP and Anadarko Incentive Plans within this Note 5).

[15] For the three and nine months ended September 30, 2015, includes accretion expense recognized on the Deferred purchase price obligation - Anadarko for the acquisition of DBJV (see Note 2 and Note 9).