Western Midstream Partners (WES) 10-Q/A 3 Feb 16 2015 Q3 Quarterly report (amended) Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2015	Oct. 26, 2015
Document And Entity Information [Abstract]
Trading Symbol	WGP
Entity Registrant Name	Western Gas Equity Partners, LP
Entity Central Index Key	1,423,902
Document Type	10-Q/A
Document Period End Date	Sep. 30, 2015
Amendment Flag	true
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q3
Amendment Description	Explanatory Note We are filing this Amendment No. 1 on Form 10-Q/A (this “Form 10-Q/A”) to amend our Quarterly Report on Form 10-Q for the quarter ended September 30, 2015, originally filed with the Securities and Exchange Commission (the “SEC”) on October 29, 2015 (the “Original Filing”), to restate our unaudited consolidated financial statements and related disclosures as of, and for the three and nine months ended, September 30, 2015. This Form 10-Q/A also amends certain other items in the Original Filing, as noted below. Restatement Background In connection with the preparation of our Annual Report on Form 10-K for the fiscal year ended December 31, 2015, it was determined that there was an error in the impairment test calculation performed as of March 31, 2015. Specifically, the impact of WES’s commodity price swap agreements with Anadarko was incorrectly included when performing an assessment to identify a triggering event that would necessitate a calculation to determine whether the net book value of certain midstream assets exceeded their fair value. It was determined that the error caused a material understatement in impairment expense for the quarter ended March 31, 2015. As a result of the discovery of this error, on January 27, 2016, the Audit Committee of the Board of Directors of our general partner, after discussion with management and KPMG LLP, our independent registered public accounting firm, concluded that the unaudited consolidated financial statements included in our Quarterly Reports on Form 10-Q for the quarterly periods ended March 31, 2015, June 30, 2015, and September 30, 2015, should no longer be relied upon due to changes related to impairments. Accordingly, we are restating our unaudited consolidated financial statements as of, and for the three and nine months ended, September 30, 2015, to reflect an impairment charge in the first quarter of 2015 of $264.4 million related to WES’s Red Desert complex, located in southwestern Wyoming. This impairment loss recorded as of March 31, 2015, also impacts depreciation and amortization for the three and nine months ended September 30, 2015. See Note 1—Description of Business and Basis of Presentation (Restated) in the Notes to Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q/A for more information regarding the impact of this adjustment. In connection with the need to restate our unaudited consolidated financial statements as a result of the error noted above, we have determined that it would be appropriate within this Form 10-Q/A to make adjustments for certain previously unrecorded immaterial adjustments. See Note 1—Description of Business and Basis of Presentation (Restated) in the Notes to Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q/A for more information regarding the impact of such adjustments. This report on Form 10-Q/A is presented as of the filing date of the Original Filing and does not reflect events occurring after that date, or modify or update the information contained therein in any way other than as required to correct the error and record the adjustments described above. Internal Control Consideration The Chief Executive Officer and Chief Financial Officer of our general partner have determined that there was a deficiency in our internal control over financial reporting that constituted a material weakness, as defined by SEC regulations, at September 30, 2015. For a discussion of management’s evaluation of our disclosure controls and procedures and the material weakness identified, see Part I, Item 4 of this Form 10-Q/A.
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Units Outstanding		218,913,688

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ 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]	10,059		9,116	[1]	30,848		28,193	[1]
Property and other taxes		8,355		6,793	[1]	25,679		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		289,265		243,892	[1]	1,149,489		699,152	[1]
Gain on divestiture, net		77,244		0	[1]	77,244		0	[1]
Operating income (loss)		195,056		132,692	[1]	176,974		358,321	[1]
Interest income – affiliates	[8]	4,225		4,225	[1]	12,675		12,675	[1]
Interest expense	[9]	(31,773)		(20,878)	[1]	(82,339)		(55,703)	[1]
Other income (expense), net		96		118	[1]	256		849	[1]
Income (loss) before income taxes		167,604		116,157	[1]	107,566		316,142	[1]
Income tax (benefit) expense		1,869		3,891	[1]	3,575		8,199	[1]
Net income (loss)		165,735		112,266	[1]	103,991		307,943	[1]
Net income (loss) attributable to noncontrolling interests		76,364		45,832	[1]	(14,643)		128,958	[1]
Net income (loss) attributable to Western Gas Equity Partners, LP		89,371		66,434	[1]	118,634		178,985	[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]
Limited partners' interest in net income (loss)	[10]	89,371		59,952	[1]	116,892		165,703	[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	[11]	17,662		15,583		50,534		44,961
General and administrative	[12]	7,875		7,214		23,154		21,786
Total operating expenses		61,210		49,831		206,351		151,818
Interest expense	[13]	(4,310)		0		(9,922)		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)
Limited Partner [Member]
Limited partners' interest in net income (loss):
Net income (loss) per common unit - basic and diluted		$ 0.41		$ 0.27	[1]	$ 0.53		$ 0.76	[1]
Weighted-average common units outstanding - basic and diluted		218,914		218,903	[1]	218,912		218,903	[1]
[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 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. 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 $7.9 million and $23.2 million for the three and nine months ended September 30, 2015, respectively, and $7.2 million and $21.8 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 WGP’s Original Filing.
[7]	“As Reported” amounts previously included as a component of Depreciation, amortization and impairments in WGP’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 WES assets (as defined in Note 1). See Note 4.
[11]	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.
[12]	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 and WGP by Anadarko (see WES LTIP and WGP LTIP and Anadarko Incentive Plans within this Note 5) and amounts charged by Anadarko under the WGP omnibus agreement.
[13]	For the three and nine months ended September 30, 2015, includes WES’s accretion expense recognized on the Deferred purchase price obligation - Anadarko for the acquisition of DBJV (see Note 2 and Note 9) and for the nine months ended September 30, 2015, includes interest expense recognized on the WGP working capital facility (see Note 9).

Consolidated Statements of Inc3

Consolidated Statements of Income (Parenthetical) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014		Sep. 30, 2015	Sep. 30, 2014
Cost of product	[1]	$ 127,721	$ 113,217	[2]	$ 414,378	$ 330,926	[2]
Operation and maintenance	[1]	80,633	67,489	[2]	218,640	184,023	[2]
General and administrative	[1]	10,059	9,116	[2]	30,848	28,193	[2]
Interest expense	[3]	31,773	20,878	[2]	82,339	55,703	[2]
Affiliates [Member]
Cost of product	[4]	35,673	27,034		132,663	85,071
Operation and maintenance	[5]	17,662	15,583		50,534	44,961
General and administrative	[6]	7,875	7,214		23,154	21,786
Interest expense	[7]	$ 4,310	$ 0		$ 9,922	$ 0
[1]	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 $7.9 million and $23.2 million for the three and nine months ended September 30, 2015, respectively, and $7.2 million and $21.8 million for the three and nine months ended September 30, 2014, respectively. See Note 5.
[2]	Financial information has been recast to include the financial position and results attributable to the DBJV system. See Note 1 and Note 2.
[3]	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.
[4]	Represents amounts earned or incurred on and subsequent to the date of 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. See Adjustments to Previously Issued Financial Statements in Note 1.
[5]	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.
[6]	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 and WGP by Anadarko (see WES LTIP and WGP LTIP and Anadarko Incentive Plans within this Note 5) and amounts charged by Anadarko under the WGP omnibus agreement.
[7]	For the three and nine months ended September 30, 2015, includes WES’s accretion expense recognized on the Deferred purchase price obligation - Anadarko for the acquisition of DBJV (see Note 2 and Note 9) and for the nine months ended September 30, 2015, includes interest expense recognized on the WGP working capital facility (see Note 9).

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014	[1]
Current assets
Cash and cash equivalents		$ 74,842	$ 67,213
Accounts receivable, net	[2]	150,427	109,019
Other current assets	[3]	11,540	10,841
Total current assets		236,809	187,073
Note receivable - Anadarko		260,000	260,000
Property, plant and equipment
Cost		5,862,721	5,626,650
Less accumulated depreciation		1,330,802	1,055,207
Net property, plant and equipment		4,531,919	4,571,443
Goodwill		387,633	389,087
Other intangible assets		839,234	884,857
Equity investments		629,627	634,492
Other assets		30,779	28,289
Total assets		6,916,001	6,955,241
Current liabilities
Accounts and natural gas imbalance payables	[4]	57,598	54,232
Accrued ad valorem taxes		26,416	14,812
Accrued liabilities		138,752	170,864
Total current liabilities		222,766	241,058
Long-term debt		2,587,189	2,422,954
Deferred income taxes		6,540	45,656
Asset retirement obligations and other		119,422	111,714
Deferred purchase price obligation - Anadarko	[5]	184,196	0
Total long-term liabilities		2,897,347	2,580,324
Total liabilities		3,120,113	2,821,382
Equity and partners' capital
Common units (218,913,688 and 218,909,977 units issued and outstanding at September 30, 2015, and December 31, 2014, respectively)		1,170,275	1,260,195
Net investment by Anadarko		0	122,509
Total partners' capital		1,170,275	1,382,704
Noncontrolling interests		2,625,613	2,751,155
Total equity and partners' capital		3,795,888	4,133,859
Total liabilities, equity and partners' capital		6,916,001	6,955,241
Anadarko [Member]
Current liabilities
WGP working capital facility - Anadarko		$ 0	$ 1,150
[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]	Accounts receivable, net includes amounts receivable from affiliates (as defined in Note 1) of $46.8 million and $64.5 million as of September 30, 2015, and December 31, 2014, respectively.
[3]	Other current assets includes natural gas imbalance receivables from affiliates of zero and $0.2 million as of September 30, 2015, and December 31, 2014, respectively.
[4]	Accounts and natural gas imbalance payables includes amounts payable to affiliates of zero and $0.1 million as of September 30, 2015, and December 31, 2014, respectively.
[5]	See Note 2.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Common units issued		218,913,688	218,909,977
Common units outstanding		218,913,688	218,909,977
Accounts receivable, net	[1]	$ 150,427	$ 109,019	[2]
Other current assets	[3]	11,540	10,841	[2]
Accounts and natural gas imbalance payables	[4]	57,598	54,232	[2]
Affiliates [Member]
Accounts receivable, net		46,800	64,500
Other current assets		0	200
Accounts and natural gas imbalance payables		$ 0	$ 100
[1]	Accounts receivable, net includes amounts receivable from affiliates (as defined in Note 1) of $46.8 million and $64.5 million as of September 30, 2015, and December 31, 2014, respectively.
[2]	Financial information has been recast to include the financial position and results attributable to the DBJV system. See Note 1 and Note 2.
[3]	Other current assets includes natural gas imbalance receivables from affiliates of zero and $0.2 million as of September 30, 2015, and December 31, 2014, respectively.
[4]	Accounts and natural gas imbalance payables includes amounts payable to affiliates of zero and $0.1 million as of September 30, 2015, and December 31, 2014, respectively.

Consolidated Statement of Equit

Consolidated Statement of Equity and Partners' Capital - 9 months ended Sep. 30, 2015 - USD ($) $ in Thousands		Total	Western Gas Partners, LP [Member]	Chipeta Processing LLC [Member]	Net Investment by Anadarko [Member]	Common Units [Member]	Noncontrolling Interests [Member]	Noncontrolling Interests [Member]Western Gas Partners, LP [Member]	Noncontrolling Interests [Member]Chipeta Processing LLC [Member]
Balance at Dec. 31, 2014	[1]	$ 4,133,859			$ 122,509	$ 1,260,195	$ 2,751,155
Net income (loss)		103,991			1,742	116,892	(14,643)
Above-market component of swap extensions with Anadarko	[2]	7,916				7,916
WES equity transactions, net	[3]	57,353				(13,058)	70,411
Distributions to noncontrolling interest owners			$ (171,737)	$ (10,150)				$ (171,737)	$ (10,150)
Distributions to WGP unitholders		(223,016)				(223,016)
Acquisitions from affiliates		(174,276)			(197,562)	23,286
Contributions of equity-based compensation to WES by Anadarko		2,617				2,617
Net pre-acquisition contributions from (distributions to) Anadarko		31,467			31,467
Net distributions to Anadarko of other assets		(4,386)				(4,386)
Elimination of net deferred tax liabilities		41,844			41,844
Other		406				(171)	577
Balance at Sep. 30, 2015		$ 3,795,888			$ 0	$ 1,170,275	$ 2,625,613
[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]	See Note 5.
[3]	Includes the impact of Western Gas Partners, LP’s public equity offerings as described in Note 4. The $13.1 million decrease to partners’ capital, together with net income (loss) attributable to Western Gas Equity Partners, LP, totaled $105.6 million for the nine months ended September 30, 2015.

Consolidated Statement of Equi7

Consolidated Statement of Equity and Partners' Capital (Parenthetical) $ in Thousands	9 Months Ended
	Sep. 30, 2015USD ($)
WES equity transactions, net	$ (57,353)	[1]
Combined change in Partners' Capital from WES equity transactions, net and net income attributable to Western Gas Equity Partners, LP	105,600
Common Units [Member]
WES equity transactions, net	$ 13,058	[1]
[1]	Includes the impact of Western Gas Partners, LP’s public equity offerings as described in Note 4. The $13.1 million decrease to partners’ capital, together with net income (loss) attributable to Western Gas Equity Partners, LP, totaled $105.6 million for the nine months ended September 30, 2015.

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2015		Sep. 30, 2014
Cash flows from operating activities
Net income (loss)		$ 103,991		$ 307,943	[1]
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization		183,715	[2],[3]	132,236	[1]
Impairments		276,229	[2],[3]	2,431	[1]
Non-cash equity-based compensation expense		3,453		3,333	[1]
Deferred income taxes		2,496		4,024	[1]
Accretion and amortization of long-term obligations, net		12,296		2,045	[1]
Equity income, net	[4],[5],[6]	(59,137)		(41,322)	[1]
Distributions from equity investment earnings	[5]	60,645		43,061	[1]
Gain on divestiture, net		(77,244)		0	[1]
Changes in assets and liabilities:
(Increase) decrease in accounts receivable, net		(24,265)		(52,681)	[1]
Increase (decrease) in accounts and natural gas imbalance payables and accrued liabilities, net		15,816		34,965	[1]
Change in other items, net		(1,184)		2,281	[1]
Net cash provided by operating activities		496,811		438,316	[1]
Cash flows from investing activities
Capital expenditures		(473,394)		(529,197)	[1]
Investments in equity affiliates		(9,052)		(63,267)	[1]
Distributions from equity investments in excess of cumulative earnings	[5]	12,409	[7]	14,387	[1]
Net cash used in investing activities		(337,989)		(950,282)	[1]
Cash flows from financing activities
Borrowings, net of debt issuance costs		769,606		1,136,878	[1]
Repayments of debt		(611,150)		(480,000)	[1]
Increase (decrease) in outstanding checks		(1,482)		2,908	[1]
Distributions to WGP unitholders		(223,016)		(164,725)	[1]
Net contributions from Anadarko		31,467		23,600	[1]
Above-market component of swap extensions with Anadarko	[8]	7,916		0	[1]
Net cash provided by (used in) financing activities		(151,193)		477,100	[1]
Net increase (decrease) in cash and cash equivalents		7,629		(34,866)	[1]
Cash and cash equivalents at beginning of period		67,213	[9]	113,085	[1]
Cash and cash equivalents at end of period		74,842		78,219	[1]
Supplemental disclosures
Net distributions to (contributions from) Anadarko of other assets		4,386		6,398	[1]
Interest paid, net of capitalized interest		60,612		43,504	[1]
Taxes paid (reimbursements received)		(138)		(340)	[1]
Capital lease asset transfer	[10]	0		4,833	[1]
Western Gas Partners, LP [Member]
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Impairments		276,229
Cash flows from financing activities
Proceeds from the issuance of WES common units, net of offering expenses		57,353		99,035	[1]
Distributions to noncontrolling interest owners of WES		(171,737)		(129,247)	[1]
Delaware Basin JV Gathering LLC [Member]
Cash flows from operating activities
Net income (loss)				14,238
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Equity income, net				0
Supplemental disclosures
Acquisition of DBJV from Anadarko	[11]	174,276		0	[1]
Chipeta Processing LLC [Member]
Cash flows from financing activities
Distributions to Chipeta noncontrolling interest owner		(10,150)		(11,349)	[1]
Affiliates [Member]
Cash flows from investing activities
Contributions in aid of construction costs from affiliates		0		183	[1]
Acquisitions		(12,131)		(372,393)	[1]
Proceeds from the sale of assets		700		0	[1]
Affiliates [Member] | Western Gas Partners, LP [Member]
Cash flows from financing activities
Distributions to WGP unitholders	[12]	(1,648)		(1,235)
Third Parties [Member]
Cash flows from investing activities
Acquisitions		(3,514)		0	[1]
Proceeds from the sale of assets		$ 146,993		$ 5	[1]
[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]	“As Reported” amounts previously included as a component of Depreciation, amortization and impairments in WGP’s Original Filing.
[3]	“As Reported” amounts previously included as a component of Depreciation, amortization and impairments in WGP’s Original Filing.
[4]	Income earned from equity investments is classified as affiliate. See Note 1.
[5]	Income earned on, distributions from and contributions to equity investments are classified as affiliate. See Note 1.
[6]	Represents amounts earned or incurred on and subsequent to the date of 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. See Adjustments to Previously Issued Financial Statements in Note 1.
[7]	Distributions in excess of cumulative earnings, classified as investing cash flows in the consolidated statements of cash flows, is calculated on an individual investment basis.
[8]	See Note 5.
[9]	Financial information has been recast to include the financial position and results attributable to the DBJV system. See Note 1 and Note 2.
[10]	For the nine months ended September 30, 2014, represents transfers of $4.6 million from other long-term assets associated with the capital lease component of a processing agreement.
[11]	See Note 2.
[12]	Represents distributions paid to other subsidiaries of Anadarko under WES’s partnership agreement (see Note 3 and Note 4).

Consolidated Statements of Cas9

Consolidated Statements of Cash Flows (Parenthetical) $ in Thousands	Sep. 30, 2014USD ($)
Natural Gas Processing Plant [Member]
Property, plant and equipment	$ 4,600

Description of Business and Bas

Description of Business and Basis of Presentation	9 Months Ended
	Sep. 30, 2015
Accounting Policies [Abstract]
Description of Business and Basis of Presentation (Restated)	1. DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION (RESTATED) General. Western Gas Equity Partners, LP is a Delaware master limited partnership formed in September 2012 to own three types of partnership interests in Western Gas Partners, LP. Western Gas Equity Partners, LP was formed by converting WGR Holdings, LLC into a limited partnership and changing its name. Western Gas Partners, LP (together with its subsidiaries, “WES”) is a Delaware master limited partnership formed by Anadarko Petroleum Corporation in 2007 to acquire, own, develop and operate midstream energy assets. For purposes of these consolidated financial statements, “WGP” refers to Western Gas Equity Partners, LP in its individual capacity or to Western Gas Equity Partners, LP and its subsidiaries, including Western Gas Holdings, LLC and WES, as the context requires. “WES GP” refers to Western Gas Holdings, LLC, individually as the general partner of WES, and excludes WES. WGP’s general partner, Western Gas Equity Holdings, LLC (“WGP GP”), is a wholly owned subsidiary of Anadarko Petroleum Corporation. “Anadarko” refers to Anadarko Petroleum Corporation and its subsidiaries, excluding WGP and WGP GP, and “affiliates” refers to subsidiaries of Anadarko, excluding WGP, and includes equity interests in Fort Union Gas Gathering, LLC (“Fort Union”), White Cliffs Pipeline, LLC (“White Cliffs”), Rendezvous Gas Services, LLC (“Rendezvous”), Enterprise EF78 LLC (the “Mont Belvieu JV”), Texas Express Pipeline LLC (“TEP”), Texas Express Gathering LLC (“TEG”) and Front Range Pipeline LLC (“FRP”). The interests in TEP, TEG and FRP are referred to collectively as the “TEFR Interests.” “Equity investment throughput” refers to WES’s 14.81% share of average Fort Union throughput and 22% share of average Rendezvous throughput, but excludes throughput measured in barrels, consisting of WES’s 10% share of average White Cliffs throughput, 25% share of average Mont Belvieu JV throughput, 20% share of average TEP and TEG throughput and 33.33% share of average FRP throughput. The “DJ Basin complex” refers to the Platte Valley system, Wattenberg system and Lancaster plant, all of which were combined into a single complex in the first quarter of 2014. The “MGR assets” include the Red Desert complex, the Granger straddle plant and the 22% interest in Rendezvous. The three types of partnership interests in WES owned by WGP are as follows: (i) the general partner interest in WES, held through WES GP; (ii) 100% of the incentive distribution rights (“IDRs”) in WES, which entitle WGP to receive increasing percentages, up to the maximum level of 48.0% , of any incremental cash distributed by WES as certain target distribution levels are reached in any quarter; and (iii) a significant limited partner interest in WES. WES GP owns all of the general partner interest in WES, which constitutes substantially all of its business, which primarily is to manage the affairs and operations of WES. Refer to Note 4 for a discussion of WGP’s holdings of WES equity. WES is engaged in the business of gathering, processing, compressing, treating and transporting natural gas, condensate, NGLs and crude oil for Anadarko, as well as for third-party producers and customers. As of September 30, 2015 , WES’s assets and investments accounted for under the equity method consisted of the following: Owned and Operated Operated Interests Non-Operated Interests Equity Interests Natural gas gathering systems 12 2 5 2 Natural gas treating facilities 9 4 — 1 Natural gas processing facilities 14 5 — 2 NGL pipelines 3 — — 3 Natural gas pipelines 4 — — — Oil pipelines 1 — — 1 These assets and investments are located in the Rocky Mountains (Colorado, Utah and Wyoming), the Mid-Continent (Kansas and Oklahoma), North-central Pennsylvania and Texas. In June 2015, WES completed the construction and commenced operations of Lancaster Train II, a processing plant located in the DJ Basin complex. In addition, WES is constructing Trains IV, V and VI, all processing plants, at the DBM complex (see Note 2 ), with operations expected to commence during the first half (Train IV) and second half (Train V) of 2016, and mid-2017 (Train VI). 1. DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION (RESTATED) (CONTINUED) Basis of presentation. The consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”). The consolidated financial statements include the accounts of WGP and entities in which it holds a controlling financial interest, including WES and WES GP. All significant intercompany transactions have been eliminated. Investments in non-controlled entities over which WES, or WGP through its investment in WES, exercises significant influence are accounted for under the equity method. WGP proportionately consolidates WES’s 33.75% share of the assets, liabilities, revenues and expenses attributable to the Non-Operated Marcellus Interest systems and Anadarko-Operated Marcellus Interest systems and WES’s 50% share of the assets, liabilities, revenues and expenses attributable to the Newcastle system and the DBJV system (see Note 2 ) in the accompanying consolidated financial statements. The consolidated financial results of WES are included in WGP’s consolidated financial statements due to WGP’s 100% ownership interest in WES GP and WES GP’s control of WES. Throughout these notes to consolidated financial statements, and to the extent material, any differences between the consolidated financial results of WGP and WES are discussed separately. WGP has no independent operations or material assets other than its partnership interests in WES. WGP’s consolidated financial statements differ from those of WES primarily as a result of (i) the presentation of noncontrolling interest ownership (attributable to the limited partner interests in WES held by the public and other subsidiaries of Anadarko), (ii) the elimination of WES GP’s investment in WES with WES GP’s underlying capital account, and (iii) the general and administrative expenses incurred by WGP, which are separate from, and in addition to, those incurred by WES. In preparing financial statements in accordance with GAAP, management makes informed judgments and estimates that affect the reported amounts of assets, liabilities, revenues and expenses. Management evaluates its estimates and related assumptions regularly, using historical experience and other methods considered reasonable. Changes in facts and circumstances or additional information may result in revised estimates and actual results may differ from these estimates. Effects on the business, financial condition and results of operations resulting from revisions to estimates are recognized when the facts that give rise to the revisions become known. The information furnished herein reflects all normal recurring adjustments which are, in the opinion of management, necessary for a fair presentation of the consolidated financial statements, and certain prior-period amounts have been reclassified to conform to the current-year presentation. Certain information and note disclosures commonly included in annual financial statements have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Accordingly, the accompanying consolidated financial statements and notes should be read in conjunction with WGP’s 2014 Form 10-K, as filed with the SEC on February 26, 2015. Management believes that the disclosures made are adequate to make the information not misleading. Restatement of Previously Issued Financial Statements. In connection with the preparation of WGP’s Annual Report on Form 10-K for the year ended December 31, 2015, it was determined that there was an error in the impairment test calculation performed as of March 31, 2015. Specifically, the impact of WES’s commodity price swap agreements with Anadarko was incorrectly included when performing an assessment to identify a triggering event that would necessitate a calculation to determine whether the net book value of certain midstream assets exceeded their fair value. It was determined that the error caused a material understatement in impairment expense for the quarter ended March 31, 2015. Accordingly, WGP’s unaudited consolidated financial statements as of, and for the three and nine months ended, September 30, 2015, and notes thereto, have been restated to reflect an impairment charge of $264.4 million related to WES’s Red Desert complex. The impairment loss recorded as of March 31, 2015, also impacts depreciation and amortization for the three and nine months ended September 30, 2015. 1. DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION (RESTATED) (CONTINUED) The tables below outline the financial statement line items, including the net income (loss) per common unit (basic and diluted), as of and for the three and nine months ended September 30, 2015, that were restated as a result of the correction of this error: Consolidated Statement of Income for the Three Months Ended September 30, 2015 Consolidated Statement of Income for the Nine Months Ended September 30, 2015 thousands except per-unit amounts As Reported Adjustments As Restated As Reported Adjustments As Restated Depreciation and amortization (1) $ 63,351 $ (3,191 ) $ 60,160 $ 190,114 $ (6,399 ) $ 183,715 Impairments (1) 2,337 — 2,337 11,827 264,402 276,229 Operating income (loss) 191,865 3,191 195,056 434,977 (258,003 ) 176,974 Income (loss) before income taxes 164,413 3,191 167,604 365,569 (258,003 ) 107,566 Income tax (benefit) expense 1,661 208 1,869 4,305 (730 ) 3,575 Net income (loss) 162,752 2,983 165,735 361,264 (257,273 ) 103,991 Net income (loss) attributable to Western Gas Equity Partners, LP 88,284 1,087 89,371 213,108 (94,474 ) 118,634 Limited partners’ interest in net income (loss) 88,284 1,087 89,371 211,366 (94,474 ) 116,892 Net income (loss) per common unit – basic and diluted $ 0.40 0.01 $ 0.41 $ 0.97 $ (0.44 ) $ 0.53 (1) “As Reported” amounts previously included as a component of Depreciation, amortization and impairments in WGP’s Original Filing. Consolidated Balance Sheet as of September 30, 2015 thousands As Reported Adjustments As Restated Accumulated depreciation $ 1,072,799 $ 258,003 $ 1,330,802 Net property, plant and equipment 4,789,922 (258,003 ) 4,531,919 Total assets 7,174,004 (258,003 ) 6,916,001 Accrued liabilities 138,985 (233 ) 138,752 Total current liabilities 222,999 (233 ) 222,766 Deferred income taxes 7,037 (497 ) 6,540 Total long-term liabilities 2,897,844 (497 ) 2,897,347 Total liabilities 3,120,843 (730 ) 3,120,113 Common units 1,264,012 (93,737 ) 1,170,275 Total partners’ capital 1,264,012 (93,737 ) 1,170,275 Noncontrolling interests 2,789,149 (163,536 ) 2,625,613 Total equity and partners’ capital 4,053,161 (257,273 ) 3,795,888 Total liabilities, equity and partners’ capital 7,174,004 (258,003 ) 6,916,001 1. DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION (RESTATED) (CONTINUED) Consolidated Statement of Cash Flows for the Nine Months Ended September 30, 2015 thousands As Reported Adjustments As Restated Net income (loss) $ 361,264 $ (257,273 ) $ 103,991 Adjustments to reconcile net income (loss) to net cash provided by operating activities: Depreciation and amortization (1) 190,114 (6,399 ) 183,715 Impairments (1) 11,827 264,402 276,229 Deferred income taxes 2,993 (497 ) 2,496 Increase (decrease) in accounts and natural gas imbalance payables and accrued liabilities, net 16,049 (233 ) 15,816 (1) “As Reported” amounts previously included as a component of Depreciation, amortization and impairments in WGP’s Original Filing. Adjustments to Previously Issued Financial Statements. WGP’s unaudited consolidated statements of income also reflect adjustments for the following amounts, which previously reduced Operation and maintenance expense, to revenues related to Gathering, processing and transportation of natural gas and natural gas liquids: (i) $25.0 million for the nine months ended September 30, 2015 (all of which relates to the six months ended June 30, 2015) and (ii) $12.0 million and $28.6 million for the three and nine months ended September 30, 2014 , respectively. Management determined that the third-party producer reimbursements received for electricity purchased by WES are more appropriately classified as revenues, instead of as a reduction to Operation and maintenance expense. The correction of this error has no impact to Net income (loss), cash flows, or any non-GAAP metric WES uses to evaluate its operations (see Key Performance Metrics under Part I, Item 2 of this Form 10-Q/A) and is not considered material to WGP’s results of operations for the three and nine months ended September 30, 2015 and 2014 . In future filings, WGP will revise its previously reported consolidated financial statements for 2013, 2014 and 2015 to reflect these adjustments. Noncontrolling interests. WGP’s noncontrolling interests in the consolidated financial statements consist of the following for all periods presented: (i) the interest in Chipeta Processing LLC (“Chipeta”) held by a third-party member, (ii) the publicly held limited partner interests in WES, (iii) the 757,619 WES common units issued by WES to other subsidiaries of Anadarko as part of the consideration paid for the acquisitions of the Non-Operated Marcellus Interest and the TEFR Interests, and (iv) the WES Class C units issued by WES to a subsidiary of Anadarko as part of the funding for the acquisition of DBM. See Note 3 and Note 4 . The difference between the carrying value of WGP’s investment in WES and the underlying book value of common units issued by WES is accounted for as an equity transaction. Thus, if WES issues common units at a price different than WGP’s per-unit carrying value, any resulting change in the carrying value of WGP’s investment in WES is reflected as an adjustment to partners’ capital. Presentation of WES assets. The term “WES assets” refers to the assets indirectly owned and interests accounted for under the equity method (see Note 7 ) by WGP through its partnership interests in WES as of September 30, 2015 . Because WGP owns the entire interest in and controls WES GP, and WGP GP is owned and controlled by Anadarko, each of WES’s acquisitions of WES assets from Anadarko has been considered a transfer of net assets between entities under common control. As such, WES assets acquired from Anadarko were initially recorded at Anadarko’s historic carrying value, which did not correlate to the total acquisition price paid by WES. Further, after an acquisition of WES assets from Anadarko, WES and WGP (by virtue of its consolidation of WES) may be required to recast their financial statements to include the activities of such WES assets from the date of common control. See Note 2 . For those periods requiring recast, the consolidated financial statements for periods prior to the acquisition of WES assets from Anadarko have been prepared from Anadarko’s historical cost-basis accounts and may not necessarily be indicative of the actual results of operations that would have occurred if WES had owned the WES assets during the periods reported. Net income (loss) attributable to the WES assets acquired from Anadarko for periods prior to WES’s acquisition of the WES assets is not allocated to the limited partners. 1. DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION (RESTATED) (CONTINUED) Recently issued accounting standards . The Financial Accounting Standards Board recently issued the following Accounting Standards Updates (“ASUs”): ASU 2015-06, Earnings Per Share (Topic - 260)—Effects on Historical Earnings per Unit of Master Limited Partnership Dropdown Transactions . This ASU contains guidance that addresses the historical earnings per unit presentation for master limited partnerships that apply the two-class method of calculating earnings per unit. When a general partner transfers or “drops down” net assets to a master limited partnership the transaction is accounted for as a transaction between entities under common control and the statements of operations are adjusted retrospectively to reflect the transaction. This ASU specifies that the historical earnings (losses) of a transferred business before the date of a dropdown transaction should be allocated entirely to the general partner, and the previously reported earnings per unit of the limited partners should not change as a result of the dropdown transaction. The ASU also requires additional disclosures about how the rights to the earnings (losses) differ before and after the dropdown transaction occurs for purposes of computing earnings per unit under the two-class method. This ASU is effective for annual and interim periods beginning in 2016 and is required to be adopted using a retrospective approach, with early adoption permitted. While WGP believes it is currently in compliance with this ASU, it continues to evaluate the impact of the adoption of this ASU on its consolidated financial statements. ASU 2015-03, Interest—Imputation of Interest (Subtopic 835-30)—Simplifying the Presentation of Debt Issuance Costs and ASU 2015-15, Interest—Imputation of Interest (Subtopic 835-30)—Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements . These ASUs will simplify the presentation of debt issuance costs by requiring such costs, except for those related to revolving credit facilities, to be presented in the balance sheet as a direct deduction from the carrying amount of the related debt liability, rather than as an asset. These ASUs are effective for annual and interim periods beginning in 2016 and are required to be adopted using a retrospective approach, with early adoption permitted. WGP does not expect the adoption to have a material impact on its consolidated financial statements. ASU 2015-02, Consolidation—Amendments to the Consolidation Analysis . This ASU will simplify existing requirements by reducing the number of acceptable consolidation models and placing more emphasis on risk of loss when determining a controlling financial interest. The provisions will affect how limited partnerships and similar entities are assessed for consolidation, including the elimination of the presumption that a general partner should consolidate a limited partnership. This ASU is effective for annual and interim periods beginning in 2016 and is required to be adopted using a retrospective or modified retrospective approach, with early adoption permitted. WGP is evaluating the impact of the adoption of this ASU on its consolidated financial statements. ASU 2014-09, Revenue from Contracts with Customers . This ASU supersedes the revenue recognition requirements in Topic 605, Revenue Recognition , and industry-specific guidance in Subtopic 932-605, Extractive Activities—Oil and Gas—Revenue Recognition , and requires an entity to recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration the entity expects to be entitled to in exchange for those goods or services. The effective date for ASU 2014-09 was delayed through the issuance of ASU 2015-14, Revenue from Contracts with Customers—Deferral of the Effective Date, to annual and interim periods beginning in 2018 and is required to be adopted using one of two retrospective application methods, with early adoption permitted in 2017. WGP is evaluating the impact of the adoption of this ASU on its consolidated financial statements.

Acquisitions and Divestitures

Acquisitions and Divestitures	9 Months Ended
	Sep. 30, 2015
Property, Plant and Equipment [Abstract]
Acquisitions and Divestitures	2. ACQUISITIONS AND DIVESTITURES The following table presents the acquisitions completed by WES during 2015 and 2014 , and identifies the funding sources for such acquisitions: thousands except unit and percent amounts Acquisition Date Percentage Deferred Purchase Price Borrowings Cash On Hand WES Common Units Issued to Anadarko WES Class C Units Issued to Anadarko TEFR Interests (1) 03/03/2014 Various (1) $ — $ 350,000 $ 6,250 308,490 — DBM (2) 11/25/2014 100 % — 475,000 298,327 — 10,913,853 DBJV system (3) 03/02/2015 50 % 174,276 — — — — (1) WES acquired a 20% interest in each of TEG and TEP and a 33.33% interest in FRP from Anadarko. These assets gather and transport NGLs primarily from the Anadarko and Denver-Julesburg (“DJ”) Basins. The interests in these entities are accounted for under the equity method of accounting. In connection with the issuance of WES common units, WES issued 6,296 general partner units to WES GP in exchange for WES GP’s proportionate capital contribution of $0.4 million . (2) WES acquired Nuevo Midstream, LLC (“Nuevo”) from a third party. Following the acquisition, WES changed the name of Nuevo to Delaware Basin Midstream, LLC (“DBM”). The assets acquired include cryogenic processing plants, a gas gathering system, and related facilities and equipment, which are collectively referred to as the “DBM complex” and serve production from Reeves, Loving and Culberson Counties, Texas and Eddy and Lea Counties, New Mexico. See DBM acquisition below for further information, including the preliminary allocation of the purchase price. (3) WES acquired Anadarko’s interest in Delaware Basin JV Gathering LLC (“DBJV”), which owns a 50% interest in a gathering system and related facilities (the “DBJV system”). The DBJV system is located in the Delaware Basin in Loving, Ward, Winkler and Reeves Counties, Texas. WES will make a cash payment on March 31, 2020, to Anadarko as consideration for the acquisition of DBJV. WES currently estimates the future payment will be $282.8 million , the net present value of which was $174.3 million as of the acquisition date. See DBJV acquisition—Deferred purchase price obligation - Anadarko below. DBJV acquisition . Because the acquisition of DBJV was a transfer of net assets between entities under common control, WGP’s historical financial statements previously filed with the SEC have been recast in this Form 10-Q/A to include the results attributable to the DBJV system as if WES owned DBJV for all periods presented. The consolidated financial statements for periods prior to WES’s acquisition of DBJV have been prepared from Anadarko’s historical cost-basis accounts and may not necessarily be indicative of the actual results of operations that would have occurred if WES had owned DBJV during the periods reported. The following table presents the impact of the DBJV system on revenues and other, equity income, net and net income (loss) as presented in WGP’s historical consolidated statements of income: Three Months Ended September 30, 2014 thousands WGP Historical (1) DBJV System Combined Revenues and other $ 341,282 $ 16,239 $ 357,521 Equity income, net 19,063 — 19,063 Net income (loss) 105,784 6,482 112,266 Nine Months Ended September 30, 2014 thousands WGP Historical (1) DBJV System Combined Revenues and other $ 970,027 $ 46,124 $ 1,016,151 Equity income, net 41,322 — 41,322 Net income (loss) 293,705 14,238 307,943 (1) See Adjustments to Previously Issued Financial Statements in Note 1 . 2. ACQUISITIONS AND DIVESTITURES (CONTINUED) Deferred purchase price obligation - Anadarko. The consideration to be paid by WES for the acquisition of DBJV consists of a cash payment to Anadarko due on March 31, 2020. The cash payment will be equal to (a) eight multiplied by the average of WES’s share in the Net Earnings (see definition below) of the DBJV system for the calendar years 2018 and 2019, less (b) WES’s share of all capital expenditures incurred for the DBJV system between March 1, 2015, and February 29, 2020. Net Earnings is defined as all revenues less cost of product, operating expenses and property taxes, in each case attributable to the DBJV system on an accrual basis. As of the acquisition date, the estimated future payment obligation was $282.8 million , which had a net present value of $174.3 million , using a discount rate of 10% . As of September 30, 2015 , the net present value of this obligation was $184.2 million and has been recorded on the consolidated balance sheet under Deferred purchase price obligation - Anadarko. Accretion expense for the three and nine months ended September 30, 2015 , was $4.3 million and $9.9 million , respectively, and has been recorded as a charge to interest expense. The fair value measurement was calculated using Level 3 inputs, which consisted of management’s estimate of WES’s share of forecasted Net Earnings and capital expenditures for the DBJV system. DBM acquisition . The DBM acquisition has been accounted for under the acquisition method of accounting. The assets acquired and liabilities assumed in the DBM acquisition were recorded in the consolidated balance sheet at their estimated fair values as of the acquisition date. Results of operations attributable to the DBM acquisition were included in the consolidated statement of income beginning on the acquisition date in the fourth quarter of 2014. The following is the preliminary allocation of the purchase price as of September 30, 2015 , including $3.5 million of post-closing purchase price adjustments, to the assets acquired and liabilities assumed in the DBM acquisition as of the acquisition date, pending final review of certain support related to the acquired entity’s assets and liabilities: thousands Current assets $ 62,940 Property, plant and equipment 467,171 Goodwill 282,697 Other intangible assets 811,048 Accounts payables (18,621 ) Accrued liabilities (37,360 ) Deferred income taxes (1,342 ) Asset retirement obligations and other (9,060 ) Total purchase price $ 1,557,473 The purchase price allocation is based on an assessment of the fair value of the assets acquired and liabilities assumed in the DBM acquisition using inputs that are not observable in the market and thus represent Level 3 inputs. The fair values of the processing plants, gathering system, and related facilities and equipment are based on market and cost approaches. The fair value of the intangible assets was determined using an income approach. Deferred taxes represent the tax effects of differences in the tax basis and acquisition-date fair value of the assets acquired and liabilities assumed. Gain on divestiture - Dew and Pinnacle systems. During the third quarter of 2015, the Dew and Pinnacle systems in East Texas were sold to a third party for net proceeds of $146.7 million , after closing adjustments, resulting in a net gain on sale of $77.2 million recorded as Gain on divestiture, net in the consolidated statements of income.

Partnership Distributions

Partnership Distributions	9 Months Ended
	Sep. 30, 2015
Distributions Made to Members or Limited Partners [Abstract]
Partnership Distributions	3. PARTNERSHIP DISTRIBUTIONS WGP partnership distributions. WGP’s partnership agreement requires WGP to distribute all of its available cash (as defined in its partnership agreement) to WGP unitholders of record on the applicable record date within 55 days of the end of each quarter. The Board of Directors of WGP GP declared the following cash distributions to WGP unitholders for the periods presented: thousands except per-unit amounts Quarters Ended Total Quarterly Distribution per Unit Total Quarterly Cash Distribution Date of Distribution 2014 March 31 $ 0.25000 $ 54,726 May 2014 June 30 0.27125 59,378 August 2014 September 30 0.29125 63,756 November 2014 December 31 0.31250 68,409 February 2015 2015 March 31 $ 0.34250 $ 74,977 May 2015 June 30 0.36375 79,630 August 2015 September 30 (1) 0.38125 83,461 November 2015 (1) On October 14, 2015 , the Board of Directors of WGP GP declared a cash distribution to WGP unitholders of $0.38125 per unit, or $83.5 million in aggregate. The cash distribution is payable on November 20, 2015 , to WGP unitholders of record at the close of business on November 2, 2015 . WES partnership distributions. WES’s partnership agreement requires WES to distribute all of its available cash (as defined in WES’s partnership agreement) to WES unitholders of record on the applicable record date within 45 days of the end of each quarter. The Board of Directors of WES GP declared the following cash distributions to WES’s common and general partner unitholders for the periods presented: thousands except per-unit amounts Quarters Ended Total Quarterly Distribution per Unit Total Quarterly Cash Distribution Date of Distribution 2014 March 31 $ 0.625 $ 98,749 May 2014 June 30 0.650 105,655 August 2014 September 30 0.675 111,608 November 2014 December 31 0.700 126,044 February 2015 2015 March 31 $ 0.725 $ 133,203 May 2015 June 30 0.750 139,736 August 2015 September 30 (1) 0.775 146,160 November 2015 (1) On October 14, 2015 , the Board of Directors of WES GP declared a cash distribution to WES unitholders of $0.775 per unit, or $146.2 million in aggregate, including incentive distributions, but excluding distributions on WES Class C units (see WES Class C unit distributions below). The cash distribution is payable on November 12, 2015 , to WES unitholders of record at the close of business on November 2, 2015 . 3. PARTNERSHIP DISTRIBUTIONS (CONTINUED) WES Class C unit distributions. WES’s Class C units receive quarterly distributions at a rate equivalent to WES’s common units. The distributions are paid in the form of additional Class C units (“PIK Class C units”) until the scheduled conversion date on December 31, 2017 (unless earlier converted), and the Class C units are disregarded with respect to WES’s distribution of WES’s available cash until they are converted to common units. The number of additional PIK Class C units to be issued in connection with a distribution payable on the Class C units is determined by dividing the corresponding distribution attributable to the Class C units by the volume-weighted-average price of WES’s common units for the ten days immediately preceding the payment date for the WES common unit distribution, less a 6% discount. WES records the PIK Class C unit distributions at fair value at the time of issuance. This Level 2 fair value measurement uses WES’s unit price as a significant input in the determination of the fair value. WES issued the following PIK Class C units to APC Midstream Holdings, LLC (“AMH”), the holder of the Class C units, for the periods presented: thousands except unit amounts For the Quarters Ended PIK Class C Units Implied Fair Value Date of 2014 December 31 (1) 45,711 $ 3,072 February 2015 2015 March 31 118,230 $ 8,101 May 2015 June 30 153,020 8,721 August 2015 (1) Prorated for the 37 -day period the Class C units were outstanding during the fourth quarter of 2014.

Equity and Partners' Capital

Equity and Partners' Capital	9 Months Ended
	Sep. 30, 2015
Partners' Capital Notes [Abstract]
Equity and Partners' Capital	4. EQUITY AND PARTNERS’ CAPITAL Holdings of WGP equity. WGP’s common units are listed on the New York Stock Exchange under the symbol “WGP.” As of September 30, 2015 , Anadarko held 191,087,365 of WGP’s common units, representing an 87.3% limited partner interest in WGP, and, through its ownership of WGP GP, Anadarko indirectly held the entire non-economic general partner interest in WGP. The public held 27,826,323 WGP common units, representing a 12.7% limited partner interest in WGP. In June 2015, Anadarko sold 2,300,000 of its WGP common units to the public through an underwritten offering, including 300,000 common units pursuant to the full exercise of the underwriters’ over-allotment option. WGP did not receive any proceeds from, or incur any expense in, the public offering. In July 2014, Anadarko sold 5,750,000 of its WGP common units to the public through an underwritten offering, including 750,000 common units pursuant to the full exercise of the underwriters’ over-allotment option. WGP did not receive any proceeds from, or incur any expense in, the public offering. Tangible equity units. In June 2015, Anadarko completed the public issuance of 9,200,000 , 7.50% tangible equity units (“TEUs”), including 1,200,000 TEUs pursuant to the full exercise of the underwriters’ over-allotment option, at a price to the public of $50.00 per TEU. Each TEU that Anadarko issued consists of (1) a prepaid equity purchase contract for WGP common units owned by Anadarko (subject to Anadarko’s right to elect to deliver shares of its common stock in lieu of such WGP common units) and (2) a senior amortizing note due June 7, 2018 . WGP did not receive any proceeds from, or incur any expense in, the public offering. Please see Note 7—Tangible Equity Units in the Notes to Consolidated Financial Statements under Part I, Item 1 of Anadarko’s Form 10-Q for the three months ended September 30, 2015 (which is not, and shall not be deemed to be, incorporated by reference herein), for a full discussion of the TEUs. 4. EQUITY AND PARTNERS’ CAPITAL (CONTINUED) Net income (loss) per common unit. For WGP, earnings per unit is calculated by dividing the limited partners’ interest in net income (loss) by the weighted-average number of common units outstanding. Net income (loss) per common unit is calculated assuming that cash distributions are equal to the net income attributable to WGP. Net income (loss) attributable to the WES assets (as defined in Note 1 ) acquired from Anadarko for periods prior to WES’s acquisition of the WES assets is not allocated to the limited partners when calculating net income (loss) per common unit. Net income equal to the amount of available cash (as defined by WGP’s partnership agreement) is allocated to WGP common unitholders consistent with actual cash distributions. Holdings of WES equity. As of September 30, 2015 , WGP held 49,296,205 WES common units, representing a 34.6% limited partner interest in WES, and, through its ownership of WES GP, WGP indirectly held 2,583,068 general partner units, representing a 1.8% general partner interest in WES, and 100% of WES’s IDRs. As of September 30, 2015 , other subsidiaries of Anadarko held 757,619 WES common units and 11,230,814 Class C units, representing an aggregate 8.4% limited partner interest in WES, and the public held 78,520,822 WES common units, representing a 55.2% limited partner interest in WES, which are both reflected as noncontrolling interests within the consolidated financial statements of WGP (see Note 1 and Note 2 ). WES equity offerings. WES completed the following public offerings of its common units during 2015 and 2014, including through its Continuous Offering Programs (“COP”): thousands except unit and per-unit amounts WES Common Units Issued WES GP Units Issued (1) Price Per Unit Underwriting Discount and Other Offering Expenses Net Proceeds to WES 2014 $125.0 million COP (2) 1,133,384 23,132 $ 73.48 $ 1,738 $ 83,245 November 2014 equity offering (3) 8,620,153 153,061 70.85 18,615 602,967 2015 $500.0 million COP (4) 873,525 — $ 66.61 $ 805 $ 57,385 (1) Represents general partner units of WES issued to WES GP in exchange for WES GP’s proportionate capital contribution. (2) Represents common and general partner units of WES issued during the year ended December 31, 2014, pursuant to WES’s registration statement filed with the SEC in August 2012 authorizing the issuance of up to an aggregate of $125.0 million of WES common units (the “$125.0 million COP”). Gross proceeds generated (including WES GP’s proportionate capital contributions) during the year ended December 31, 2014, were $85.0 million . The price per unit in the table above represents an average price for all issuances under the $125.0 million COP during the year ended December 31, 2014. As of December 31, 2014, WES had used all the capacity to issue common units under this registration statement. (3) Includes the issuance of 1,120,153 WES common units pursuant to the partial exercise of the underwriters’ over-allotment option, the net proceeds from which were $77.0 million . Beginning with this partial exercise, WES GP elected not to make a corresponding capital contribution to maintain its 2.0% interest in WES. (4) Represents common units of WES issued during the nine months ended September 30, 2015 , pursuant to WES’s registration statement filed with the SEC in August 2014 authorizing the issuance of up to an aggregate of $500.0 million of WES common units (the “$500.0 million COP”). Gross proceeds generated during the three and nine months ended September 30, 2015 , were zero and $58.2 million , respectively. Commissions paid during the three and nine months ended September 30, 2015 , were zero and $0.6 million , respectively. The price per unit in the table above represents an average price for all issuances under the $500.0 million COP during the nine months ended September 30, 2015 . 4. EQUITY AND PARTNERS’ CAPITAL (CONTINUED) WES Class C units. In connection with the closing of the DBM acquisition in November 2014, WES issued 10,913,853 Class C units to AMH at a price of $68.72 per unit, generating proceeds of $750.0 million , pursuant to the Unit Purchase Agreement (“UPA”) with Anadarko and AMH. All outstanding Class C units will convert into common units on a one-for-one basis on December 31, 2017, unless WES elects to convert such units earlier or Anadarko extends the conversion date. The Class C units were issued to partially fund WES’s acquisition of DBM, and the UPA contains an optional redemption feature that provides WES the ability to redeem up to $150.0 million of the Class C units within 10 days of the receipt of cash proceeds from an entity that is not an affiliate of WES or AMH, if these cash proceeds were in relation to (i) the assets of DBM, (ii) the equity interests in DBM or (iii) the equity interests in a subsidiary of WES that owns a majority of the outstanding equity interests in DBM. As of September 30, 2015 , no such proceeds had been received and no WES Class C units had been redeemed. WES common, Class C and general partner units . The following table summarizes WES’s common, Class C and general partner units issued during the nine months ended September 30, 2015 : WES Common Units WES Class C Units WES General Partner Units Total Balance at December 31, 2014 127,695,130 10,913,853 2,583,068 141,192,051 PIK Class C units — 316,961 — 316,961 Long-Term Incentive Plan award vestings 5,991 — — 5,991 $500.0 million COP 873,525 — — 873,525 Balance at September 30, 2015 128,574,646 11,230,814 2,583,068 142,388,528

Transactions with Affiliates

Transactions with Affiliates	9 Months Ended
	Sep. 30, 2015
Related Party Fees and Other Arrangements, Limited Liability Company (LLC) or Limited Partnership (LP) [Abstract]
Transactions with Affiliates	5. TRANSACTIONS WITH AFFILIATES Affiliate transactions. Revenues from affiliates include amounts earned by WES from services provided to Anadarko as well as from the sale of residue, drip condensate and NGLs to Anadarko. In addition, WES purchases natural gas from an affiliate of Anadarko pursuant to gas purchase agreements. Operation and maintenance expense includes amounts accrued for or paid to affiliates for the operation of WES assets, whether in providing services to affiliates or to third parties, including field labor, measurement and analysis, and other disbursements. A portion of general and administrative expenses is paid by Anadarko, which results in affiliate transactions pursuant to the reimbursement provisions of the omnibus agreements of WES and WGP. Affiliate expenses do not bear a direct relationship to affiliate revenues, and third-party expenses do not bear a direct relationship to third-party revenues. See Note 2 for further information related to contributions of assets to WES by Anadarko. Cash management. Anadarko operates a cash management system whereby excess cash from most of its subsidiaries’ separate bank accounts is generally swept to centralized accounts. Prior to the acquisition of WES assets, third-party sales and purchases related to such assets were received or paid in cash by Anadarko within its centralized cash management system. The outstanding affiliate balances were entirely settled through an adjustment to net investment by Anadarko in connection with the acquisition of WES assets. Subsequent to the acquisition of WES assets from Anadarko, transactions related to such assets are cash-settled directly with third parties and with Anadarko affiliates. Chipeta cash settles its transactions directly with third parties and Anadarko, as well as with the other subsidiaries of WES. 5. TRANSACTIONS WITH AFFILIATES (CONTINUED) Note receivable from and Deferred purchase price obligation - Anadarko. Concurrently with the closing of WES’s May 2008 initial public offering, WES loaned $260.0 million to Anadarko in exchange for a 30-year note bearing interest at a fixed annual rate of 6.50% , payable quarterly. The fair value of the note receivable from Anadarko was $288.9 million and $317.8 million at September 30, 2015 , and December 31, 2014 , respectively. The fair value of the note reflects consideration of credit risk and any premium or discount for the differential between the stated interest rate and quarter-end market interest rate, based on quoted market prices of similar debt instruments. Accordingly, the fair value of the note receivable from Anadarko is measured using Level 2 inputs. The consideration to be paid by WES for the March 2015 acquisition of DBJV consists of a cash payment to Anadarko due on March 31, 2020. See Note 2 and Note 9 . Commodity price swap agreements. WES has commodity price swap agreements with Anadarko to mitigate exposure to a substantial majority of the commodity price volatility that would otherwise be present as a result of the purchase and sale of natural gas, condensate or NGLs. Notional volumes for each of the commodity price swap agreements are not specifically defined. Instead, the commodity price swap agreements apply to the actual volume of natural gas, condensate and NGLs purchased and sold at the Hugoton system, the MGR assets and the DJ Basin complex, with various expiration dates through December 2016 . On December 31, 2014, WES’s commodity price swap agreements for the Hilight and Newcastle systems and the Granger complex (excluding the Granger straddle plant) expired without renewal. The commodity price swap agreements do not satisfy the definition of a derivative financial instrument and, therefore, are not required to be measured at fair value. Below is a summary of the fixed price ranges on all of WES’s outstanding commodity price swap agreements as of September 30, 2015 : per barrel except natural gas 2015 2016 Ethane $ 18.41 − 23.41 $ 23.11 Propane 47.08 − 52.99 52.90 Isobutane 62.09 − 74.02 73.89 Normal butane 54.62 − 65.04 64.93 Natural gasoline 72.88 − 81.82 81.68 Condensate 76.47 − 81.82 81.68 Natural gas (per MMBtu) 4.66 − 5.96 4.87 The following table summarizes gains and losses upon settlement of commodity price swap agreements recognized in the consolidated statements of income: Three Months Ended Nine Months Ended thousands 2015 2014 2015 2014 Gains (losses) on commodity price swap agreements related to sales: (1) Natural gas sales $ 5,774 $ 3,179 $ 39,100 $ 1,525 Natural gas liquids sales 33,746 22,737 116,475 66,746 Total 39,520 25,916 155,575 68,271 Losses on commodity price swap agreements related to purchases (2) (23,998 ) (19,533 ) (99,897 ) (38,081 ) Net gains (losses) on commodity price swap agreements $ 15,522 $ 6,383 $ 55,678 $ 30,190 (1) Reported in affiliate natural gas, natural gas liquids and drip condensate sales in the consolidated statements of income in the period in which the related sale is recorded. (2) Reported in cost of product in the consolidated statements of income in the period in which the related purchase is recorded. 5. TRANSACTIONS WITH AFFILIATES (CONTINUED) DJ Basin complex and Hugoton system swap extensions. On June 25, 2015, WES extended its commodity price swap agreements with Anadarko for the DJ Basin complex from July 1, 2015, through December 31, 2015, and for the Hugoton system from October 1, 2015, through December 31, 2015. The table below summarizes the swap prices compared to the forward market prices on the date the commodity price swap extensions were executed. DJ Basin Complex Hugoton System per barrel except natural gas 2015 Swap Prices Market Prices (1) 2015 Swap Prices Market Prices (1) Ethane $ 18.41 $ 1.96 — — Propane 47.08 13.10 — — Isobutane 62.09 19.75 — — Normal butane 54.62 18.99 — — Natural gasoline 72.88 52.59 — — Condensate 76.47 52.59 $ 78.61 $ 32.56 Natural gas (per MMBtu) 5.96 2.75 5.50 2.74 (1) Represents the New York Mercantile Exchange forward strip price as of June 25, 2015, adjusted for location, basis and, in the case of NGLs, transportation and fractionation costs. Revenues or costs attributable to volumes settled during the respective extension period, at the applicable market price in the above table, will be recognized in the consolidated statements of income. WES will also record a capital contribution from Anadarko in its consolidated statement of equity and partners’ capital for the amount by which the swap price exceeds the applicable market price in the above table. For each of the three and nine months ended September 30, 2015 , the capital contribution from Anadarko was $7.9 million . Gas gathering and processing agreements. WES has significant gas gathering and processing arrangements with affiliates of Anadarko on a majority of its systems. WES’s gathering, treating and transportation throughput (excluding equity investment throughput and throughput measured in barrels) attributable to natural gas production owned or controlled by Anadarko was 42% and 46% for the three and nine months ended September 30, 2015 , respectively, and 48% and 49% for the three and nine months ended September 30, 2014 , respectively. WES’s processing throughput (excluding equity investment throughput and throughput measured in barrels) attributable to natural gas production owned or controlled by Anadarko was 47% and 51% for the three and nine months ended September 30, 2015 , respectively, and 58% for each of the three and nine months ended September 30, 2014 . Purchase and sale agreements. WES sells a significant amount of its natural gas, condensate and NGLs to Anadarko Energy Services Company (“AESC”), Anadarko’s marketing affiliate. In addition, WES purchases natural gas, condensate and NGLs from AESC pursuant to purchase agreements. WES’s purchase and sale agreements with AESC are generally one-year contracts, subject to annual renewal. 5. TRANSACTIONS WITH AFFILIATES (CONTINUED) WGP LTIP. WGP GP awards phantom units under the Western Gas Equity Partners, LP 2012 Long-Term Incentive Plan (“WGP LTIP”) primarily to its independent directors and its Chief Executive Officer. The phantom units awarded to the independent directors vest one year from the grant date, while all other awards are subject to graded vesting over a three -year service period. Compensation expense is recognized over the vesting period and was $56,000 and $0.2 million for the three and nine months ended September 30, 2015 , respectively, and $57,000 and $0.1 million for the three and nine months ended September 30, 2014 , respectively. WES LTIP. WES GP awards phantom units under the Western Gas Partners, LP 2008 Long-Term Incentive Plan (“WES LTIP”) primarily to its independent directors, but also from time to time to its executive officers and Anadarko employees performing services for WES. The phantom units awarded to the independent directors vest one year from the grant date, while all other awards are subject to graded vesting over a three -year service period. Compensation expense is recognized over the vesting period and was $0.1 million and $0.4 million for the three and nine months ended September 30, 2015 , respectively, and $0.2 million and $0.5 million for the three and nine months ended September 30, 2014 , respectively. WGP LTIP and Anadarko Incentive Plans. General and administrative expenses included $1.0 million and $3.1 million for the three and nine months ended September 30, 2015 , respectively, and $0.9 million and $2.7 million for the three and nine months ended September 30, 2014 , respectively, of equity-based compensation expense, allocated to WES by Anadarko, for awards granted to the executive officers of WES GP and other employees under the WGP LTIP and the Anadarko Petroleum Corporation 2008 and 2012 Omnibus Incentive Compensation Plans (collectively referred to as the “Anadarko Incentive Plans”). Of this amount, $2.7 million is reflected as a contribution to partners’ capital in the consolidated statement of equity and partners’ capital for the nine months ended September 30, 2015 . Equipment purchases and sales. The following table summarizes WES’s purchases from and sales to Anadarko of pipe and equipment: Nine Months Ended September 30, 2015 2014 2015 2014 thousands Purchases Sales Cash consideration $ 12,131 $ 16,143 $ 700 $ — Net carrying value 7,411 9,745 366 — Partners’ capital adjustment $ 4,720 $ 6,398 $ 334 $ — 5. TRANSACTIONS WITH AFFILIATES (CONTINUED) Summary of affiliate transactions. The following table summarizes affiliate transactions, which include revenue from affiliates, reimbursement of operating expenses and purchases of natural gas: Three Months Ended Nine Months Ended thousands 2015 2014 2015 2014 Revenues and other (1) $ 247,458 $ 269,632 $ 777,739 $ 769,331 Equity income, net (1) 21,976 19,063 59,137 41,322 Cost of product (1) 35,673 27,034 132,663 85,071 Operation and maintenance (2) 17,662 15,583 50,534 44,961 General and administrative (3) 7,875 7,214 23,154 21,786 Operating expenses 61,210 49,831 206,351 151,818 Interest income (4) 4,225 4,225 12,675 12,675 Interest expense (5) 4,310 — 9,922 — Distributions to WGP unitholders (6) 69,508 52,456 196,177 148,291 Distributions to WES unitholders (7) 568 492 1,648 1,235 (1) Represents amounts earned or incurred on and subsequent to the date of 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. See Adjustments to Previously Issued Financial Statements in Note 1 . (2) 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. (3) 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 and WGP by Anadarko (see WES LTIP and WGP LTIP and Anadarko Incentive Plans within this Note 5 ) and amounts charged by Anadarko under the WGP omnibus agreement. (4) Represents interest income recognized on the note receivable from Anadarko. (5) For the three and nine months ended September 30, 2015 , includes WES’s accretion expense recognized on the Deferred purchase price obligation - Anadarko for the acquisition of DBJV (see Note 2 and Note 9 ) and for the nine months ended September 30, 2015 , includes interest expense recognized on the WGP working capital facility (see Note 9 ). (6) Represents distributions paid under WGP’s partnership agreement (see Note 3 and Note 4 ). (7) Represents distributions paid to other subsidiaries of Anadarko under WES’s partnership agreement (see Note 3 and Note 4 ). Concentration of credit risk. Anadarko was the only customer from whom revenues exceeded 10% of consolidated revenues for all periods presented in the consolidated statements of income.

Property, Plant and Equipment

Property, Plant and Equipment	9 Months Ended
	Sep. 30, 2015
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment (Restated)	6. PROPERTY, PLANT AND EQUIPMENT (RESTATED) A summary of the historical cost of property, plant and equipment is as follows: thousands Estimated Useful Life September 30, 2015 (Restated) December 31, 2014 Land n/a $ 3,191 $ 2,884 Gathering systems 3 to 47 years 5,431,716 4,972,892 Pipelines and equipment 15 to 45 years 136,303 151,107 Assets under construction n/a 272,445 483,347 Other 3 to 40 years 19,066 16,420 Total property, plant and equipment 5,862,721 5,626,650 Accumulated depreciation 1,330,802 1,055,207 Net property, plant and equipment $ 4,531,919 $ 4,571,443 The cost of property classified as “Assets under construction” is excluded from capitalized costs being depreciated. These amounts represent property that is not yet suitable to be placed into productive service as of the respective balance sheet date. During the nine months ended September 30, 2015, WES recognized impairments of $276.2 million , primarily due to an impairment of $264.4 million at WES’s Red Desert complex. This asset was impaired to its estimated fair value of $23.2 million , using the income approach and Level 3 fair value inputs, due to a reduction in estimated future cash flows caused by the low commodity price environment and resulting reduced producer drilling activity and related throughput. Also during this period, WES recognized impairments of $11.8 million , primarily due to the abandonment of compressors at the MIGC system and the DJ Basin complex, and the cancellation of projects at the Non-Operated Marcellus Interest systems, the DBJV system and the Brasada and Red Desert complexes.

Equity Investments

Equity Investments	9 Months Ended
	Sep. 30, 2015
Equity Method Investments and Joint Ventures [Abstract]
Equity Investments	7. EQUITY INVESTMENTS The following table presents the activity of WES’s equity investments for the nine months ended September 30, 2015 : Equity Investments thousands Fort Union White Cliffs Rendezvous Mont Belvieu JV TEG TEP FRP Total Balance at December 31, 2014 $ 25,933 $ 44,315 $ 56,336 $ 121,337 $ 16,790 $ 198,793 $ 170,988 $ 634,492 Investment earnings (loss), net of amortization 4,831 10,663 1,591 17,256 475 11,691 12,630 59,137 Contributions — 6,081 — (432 ) — 1,520 1,883 9,052 Distributions (4,606 ) (10,227 ) (3,047 ) (17,924 ) (685 ) (11,880 ) (12,276 ) (60,645 ) Distributions in excess of cumulative earnings (1) — (2,584 ) (2,708 ) (1,987 ) (82 ) (4,302 ) (746 ) (12,409 ) Balance at September 30, 2015 $ 26,158 $ 48,248 $ 52,172 $ 118,250 $ 16,498 $ 195,822 $ 172,479 $ 629,627 (1) Distributions in excess of cumulative earnings, classified as investing cash flows in the consolidated statements of cash flows, is calculated on an individual investment basis.

Components of Working Capital

Components of Working Capital	9 Months Ended
	Sep. 30, 2015
Components Of Working Capital [Abstract]
Components of Working Capital (Restated)	8. COMPONENTS OF WORKING CAPITAL (RESTATED) A summary of other current assets is as follows: thousands September 30, 2015 December 31, 2014 Natural gas liquids inventory $ 6,486 $ 5,316 Natural gas imbalance receivables 177 415 Prepaid insurance 2,732 3,217 Other 2,145 1,893 Total other current assets $ 11,540 $ 10,841 A summary of accrued liabilities is as follows: thousands September 30, 2015 (Restated) December 31, 2014 Accrued capital expenditures $ 70,118 $ 128,856 Accrued plant purchases 26,068 14,023 Accrued interest expense 34,169 24,741 Short-term asset retirement obligations 4,335 1,224 Short-term remediation and reclamation obligations 475 475 Income taxes payable 468 207 Other 3,119 1,338 Total accrued liabilities $ 138,752 $ 170,864

Debt and Interest Expense

Debt and Interest Expense	9 Months Ended
	Sep. 30, 2015
Debt Instruments [Abstract]
Debt and Interest Expense	9. DEBT AND INTEREST EXPENSE At September 30, 2015 , WES’s debt consisted of 5.375% Senior Notes due 2021 (the “2021 Notes”), 4.000% Senior Notes due 2022 (the “2022 Notes”), 2.600% Senior Notes due 2018 (the “2018 Notes”), 5.450% Senior Notes due 2044 (the “2044 Notes”), 3.950% Senior Notes due 2025 (the “2025 Notes”), and borrowings on WES’s senior unsecured revolving credit facility (“WES RCF”). The following table presents WES and WGP’s outstanding debt as of September 30, 2015 , and December 31, 2014 : September 30, 2015 December 31, 2014 thousands Principal Carrying Value Fair Value (1) Principal Carrying Value Fair Value (1) WGP working capital facility - Anadarko $ — $ — $ — $ 1,150 $ 1,150 $ 1,150 Long-term debt 2021 Notes $ 500,000 $ 496,139 $ 534,860 $ 500,000 $ 495,714 $ 549,530 2022 Notes 670,000 672,662 654,858 670,000 672,930 681,942 2018 Notes 350,000 350,380 350,151 350,000 350,474 352,162 2044 Notes 400,000 393,901 365,196 400,000 393,836 417,619 2025 Notes 500,000 494,107 465,247 — — — WES RCF 180,000 180,000 180,000 510,000 510,000 510,000 Total long-term debt $ 2,600,000 $ 2,587,189 $ 2,550,312 $ 2,430,000 $ 2,422,954 $ 2,511,253 (1) Fair value is measured using the market approach and Level 2 inputs. 9. DEBT AND INTEREST EXPENSE (CONTINUED) Debt activity. The following table presents WES and WGP’s debt activity for the nine months ended September 30, 2015 : thousands Carrying Value Balance at December 31, 2014 $ 2,424,104 WES RCF borrowings 280,000 Issuance of 2025 Notes 500,000 Repayments of WES RCF borrowings (610,000 ) Repayment of WGP working capital facility (1,150 ) Other (5,765 ) Balance at September 30, 2015 $ 2,587,189 WES Senior Notes. The 2025 Notes issued in June 2015 were offered at a price to the public of 98.789% of the face amount. Including the effects of the issuance and underwriting discounts, the effective interest rate of the 2025 Notes is 4.205% . Interest is paid semi-annually on June 1 and December 1 of each year. Proceeds (net of underwriting discount of $3.3 million , original issue discount and debt issuance costs) were used to repay a portion of the amount outstanding under the WES RCF. At September 30, 2015 , WES was in compliance with all covenants under the indentures governing its outstanding notes. WES RCF. The interest rate on the WES RCF, which matures in February 2019, was 1.49% and 1.46% at September 30, 2015 , and September 30, 2014 , respectively. The facility fee rate was 0.20% at September 30, 2015 , and September 30, 2014 . As of September 30, 2015 , WES had $180.0 million of outstanding borrowings, $12.8 million in outstanding letters of credit and $1.0 billion available for borrowing under the WES RCF. At September 30, 2015 , WES was in compliance with all covenants under the WES RCF. WGP working capital facility. On November 1, 2012, WGP entered into a $30.0 million working capital facility (the “WGP WCF”) with Anadarko as the lender. Borrowings under the facility will mature on November 1, 2017. The interest rate was 1.69% and 1.66% at September 30, 2015 , and September 30, 2014 , respectively. As of September 30, 2015 , WGP had no outstanding borrowings and $30.0 million available for borrowing under the WGP WCF. At September 30, 2015 , WGP was in compliance with all covenants under the WGP WCF. Interest expense. The following table summarizes the amounts included in interest expense: Three Months Ended Nine Months Ended thousands 2015 2014 2015 2014 Third parties Long-term debt $ 26,972 $ 21,671 $ 75,047 $ 59,251 Amortization of debt issuance costs and commitment fees 1,530 1,107 4,196 3,799 Capitalized interest (1,039 ) (1,900 ) (6,826 ) (7,347 ) Total interest expense – third parties 27,463 20,878 72,417 55,703 Affiliates WGP WCF — — 2 — Deferred purchase price obligation – Anadarko (1) 4,310 — 9,920 — Total interest expense – affiliates 4,310 — 9,922 — Interest expense $ 31,773 $ 20,878 $ 82,339 $ 55,703 (1) See Note 2 for a discussion of the accretion and present value of the Deferred purchase price obligation - Anadarko.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	10. COMMITMENTS AND CONTINGENCIES Litigation and legal proceedings. In March 2011, DCP Midstream, LP (“DCP”) filed a lawsuit against Anadarko and others, including a subsidiary of WES, Kerr-McGee Gathering, LLC, in Weld County District Court (the “Court”) in Colorado, alleging that Anadarko diverted gas from DCP’s gathering and processing facilities in breach of certain dedication agreements. In addition to various claims against Anadarko, DCP is claiming unjust enrichment and other damages against Kerr-McGee Gathering, LLC, the entity that holds the Wattenberg assets (located in the DJ Basin complex). Anadarko countersued DCP asserting that DCP has not properly allocated values and charges to Anadarko for the gas that DCP gathers and/or processes, and seeks a judgment that DCP has no valid gathering or processing rights to much of the gas production it is claiming, in addition to other claims. The Court has scheduled this matter for trial in June 2016, and the parties are currently engaged in discovery and motion practice. Management does not believe the outcome of this proceeding will have a material effect on the financial condition, results of operations or cash flows of WGP. WES intends to vigorously defend this litigation. Furthermore, without regard to the merit of DCP’s claims, management believes that WES has adequate contractual indemnities covering the claims against it in this lawsuit. In addition, from time to time, WGP, through its partnership interests in WES, is involved in legal, tax, regulatory and other proceedings in various forums regarding performance, contracts and other matters that arise in the ordinary course of business. Management is not aware of any such proceeding the final disposition of which could have a material adverse effect on the financial condition, results of operations or cash flows of WGP. Other commitments. WES has short-term payment obligations, or commitments, related to its capital spending programs, as well as those of its unconsolidated affiliates. As of September 30, 2015 , WES had unconditional payment obligations for services to be rendered or products to be delivered in connection with its capital projects of $42.0 million , the majority of which is expected to be paid in the next twelve months. These commitments relate primarily to the construction of Trains IV, V and VI at the DBM complex and expansion projects at the DBJV system and the DJ Basin complex. Lease commitments. Anadarko, on WES’s behalf, has entered into lease agreements for corporate offices, shared field offices and a warehouse supporting WES’s operations, for which Anadarko charges WES rent. The leases for the corporate offices and shared field offices extend through 2017 and 2018, respectively, and the lease for the warehouse extends through February 2017. Rent expense associated with the office, warehouse and equipment leases was $4.9 million and $13.6 million for the three and nine months ended September 30, 2015 , respectively, and $2.4 million and $6.8 million for the three and nine months ended September 30, 2014 , respectively.

Description of Business and B20

Description of Business and Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2015
Accounting Policies [Abstract]
Business combinations policy	Basis of presentation. The consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”). The consolidated financial statements include the accounts of WGP and entities in which it holds a controlling financial interest, including WES and WES GP. All significant intercompany transactions have been eliminated. Investments in non-controlled entities over which WES, or WGP through its investment in WES, exercises significant influence are accounted for under the equity method. WGP proportionately consolidates WES’s 33.75% share of the assets, liabilities, revenues and expenses attributable to the Non-Operated Marcellus Interest systems and Anadarko-Operated Marcellus Interest systems and WES’s 50% share of the assets, liabilities, revenues and expenses attributable to the Newcastle system and the DBJV system (see Note 2 ) in the accompanying consolidated financial statements. The consolidated financial results of WES are included in WGP’s consolidated financial statements due to WGP’s 100% ownership interest in WES GP and WES GP’s control of WES. Throughout these notes to consolidated financial statements, and to the extent material, any differences between the consolidated financial results of WGP and WES are discussed separately. WGP has no independent operations or material assets other than its partnership interests in WES. WGP’s consolidated financial statements differ from those of WES primarily as a result of (i) the presentation of noncontrolling interest ownership (attributable to the limited partner interests in WES held by the public and other subsidiaries of Anadarko), (ii) the elimination of WES GP’s investment in WES with WES GP’s underlying capital account, and (iii) the general and administrative expenses incurred by WGP, which are separate from, and in addition to, those incurred by WES. Presentation of WES assets. The term “WES assets” refers to the assets indirectly owned and interests accounted for under the equity method (see Note 7 ) by WGP through its partnership interests in WES as of September 30, 2015 . Because WGP owns the entire interest in and controls WES GP, and WGP GP is owned and controlled by Anadarko, each of WES’s acquisitions of WES assets from Anadarko has been considered a transfer of net assets between entities under common control. As such, WES assets acquired from Anadarko were initially recorded at Anadarko’s historic carrying value, which did not correlate to the total acquisition price paid by WES. Further, after an acquisition of WES assets from Anadarko, WES and WGP (by virtue of its consolidation of WES) may be required to recast their financial statements to include the activities of such WES assets from the date of common control. See Note 2 . For those periods requiring recast, the consolidated financial statements for periods prior to the acquisition of WES assets from Anadarko have been prepared from Anadarko’s historical cost-basis accounts and may not necessarily be indicative of the actual results of operations that would have occurred if WES had owned the WES assets during the periods reported. Net income (loss) attributable to the WES assets acquired from Anadarko for periods prior to WES’s acquisition of the WES assets is not allocated to the limited partners. DBM acquisition . The DBM acquisition has been accounted for under the acquisition method of accounting. The assets acquired and liabilities assumed in the DBM acquisition were recorded in the consolidated balance sheet at their estimated fair values as of the acquisition date. Results of operations attributable to the DBM acquisition were included in the consolidated statement of income beginning on the acquisition date in the fourth quarter of 2014.
Noncontrolling interests policy	Noncontrolling interests. WGP’s noncontrolling interests in the consolidated financial statements consist of the following for all periods presented: (i) the interest in Chipeta Processing LLC (“Chipeta”) held by a third-party member, (ii) the publicly held limited partner interests in WES, (iii) the 757,619 WES common units issued by WES to other subsidiaries of Anadarko as part of the consideration paid for the acquisitions of the Non-Operated Marcellus Interest and the TEFR Interests, and (iv) the WES Class C units issued by WES to a subsidiary of Anadarko as part of the funding for the acquisition of DBM. See Note 3 and Note 4 . The difference between the carrying value of WGP’s investment in WES and the underlying book value of common units issued by WES is accounted for as an equity transaction. Thus, if WES issues common units at a price different than WGP’s per-unit carrying value, any resulting change in the carrying value of WGP’s investment in WES is reflected as an adjustment to partners’ capital.
Net income per common unit policy	Net income (loss) per common unit. For WGP, earnings per unit is calculated by dividing the limited partners’ interest in net income (loss) by the weighted-average number of common units outstanding. Net income (loss) per common unit is calculated assuming that cash distributions are equal to the net income attributable to WGP. Net income (loss) attributable to the WES assets (as defined in Note 1 ) acquired from Anadarko for periods prior to WES’s acquisition of the WES assets is not allocated to the limited partners when calculating net income (loss) per common unit. Net income equal to the amount of available cash (as defined by WGP’s partnership agreement) is allocated to WGP common unitholders consistent with actual cash distributions.
Fair value policy	Deferred purchase price obligation - Anadarko. The consideration to be paid by WES for the acquisition of DBJV consists of a cash payment to Anadarko due on March 31, 2020. The cash payment will be equal to (a) eight multiplied by the average of WES’s share in the Net Earnings (see definition below) of the DBJV system for the calendar years 2018 and 2019, less (b) WES’s share of all capital expenditures incurred for the DBJV system between March 1, 2015, and February 29, 2020. Net Earnings is defined as all revenues less cost of product, operating expenses and property taxes, in each case attributable to the DBJV system on an accrual basis. As of the acquisition date, the estimated future payment obligation was $282.8 million , which had a net present value of $174.3 million , using a discount rate of 10% . As of September 30, 2015 , the net present value of this obligation was $184.2 million and has been recorded on the consolidated balance sheet under Deferred purchase price obligation - Anadarko. Accretion expense for the three and nine months ended September 30, 2015 , was $4.3 million and $9.9 million , respectively, and has been recorded as a charge to interest expense. The fair value measurement was calculated using Level 3 inputs, which consisted of management’s estimate of WES’s share of forecasted Net Earnings and capital expenditures for the DBJV system. DBM acquisition . The DBM acquisition has been accounted for under the acquisition method of accounting. The assets acquired and liabilities assumed in the DBM acquisition were recorded in the consolidated balance sheet at their estimated fair values as of the acquisition date. Results of operations attributable to the DBM acquisition were included in the consolidated statement of income beginning on the acquisition date in the fourth quarter of 2014. The purchase price allocation is based on an assessment of the fair value of the assets acquired and liabilities assumed in the DBM acquisition using inputs that are not observable in the market and thus represent Level 3 inputs. The fair values of the processing plants, gathering system, and related facilities and equipment are based on market and cost approaches. The fair value of the intangible assets was determined using an income approach. Deferred taxes represent the tax effects of differences in the tax basis and acquisition-date fair value of the assets acquired and liabilities assumed. WES Class C unit distributions. WES’s Class C units receive quarterly distributions at a rate equivalent to WES’s common units. The distributions are paid in the form of additional Class C units (“PIK Class C units”) until the scheduled conversion date on December 31, 2017 (unless earlier converted), and the Class C units are disregarded with respect to WES’s distribution of WES’s available cash until they are converted to common units. The number of additional PIK Class C units to be issued in connection with a distribution payable on the Class C units is determined by dividing the corresponding distribution attributable to the Class C units by the volume-weighted-average price of WES’s common units for the ten days immediately preceding the payment date for the WES common unit distribution, less a 6% discount. WES records the PIK Class C unit distributions at fair value at the time of issuance. This Level 2 fair value measurement uses WES’s unit price as a significant input in the determination of the fair value. Note receivable from and Deferred purchase price obligation - Anadarko. Concurrently with the closing of WES’s May 2008 initial public offering, WES loaned $260.0 million to Anadarko in exchange for a 30-year note bearing interest at a fixed annual rate of 6.50% , payable quarterly. The fair value of the note receivable from Anadarko was $288.9 million and $317.8 million at September 30, 2015 , and December 31, 2014 , respectively. The fair value of the note reflects consideration of credit risk and any premium or discount for the differential between the stated interest rate and quarter-end market interest rate, based on quoted market prices of similar debt instruments. Accordingly, the fair value of the note receivable from Anadarko is measured using Level 2 inputs.
Use of estimates policy	In preparing financial statements in accordance with GAAP, management makes informed judgments and estimates that affect the reported amounts of assets, liabilities, revenues and expenses. Management evaluates its estimates and related assumptions regularly, using historical experience and other methods considered reasonable. Changes in facts and circumstances or additional information may result in revised estimates and actual results may differ from these estimates. Effects on the business, financial condition and results of operations resulting from revisions to estimates are recognized when the facts that give rise to the revisions become known. The information furnished herein reflects all normal recurring adjustments which are, in the opinion of management, necessary for a fair presentation of the consolidated financial statements, and certain prior-period amounts have been reclassified to conform to the current-year presentation.
Recently issued accounting standards policy	Recently issued accounting standards . The Financial Accounting Standards Board recently issued the following Accounting Standards Updates (“ASUs”): ASU 2015-06, Earnings Per Share (Topic - 260)—Effects on Historical Earnings per Unit of Master Limited Partnership Dropdown Transactions . This ASU contains guidance that addresses the historical earnings per unit presentation for master limited partnerships that apply the two-class method of calculating earnings per unit. When a general partner transfers or “drops down” net assets to a master limited partnership the transaction is accounted for as a transaction between entities under common control and the statements of operations are adjusted retrospectively to reflect the transaction. This ASU specifies that the historical earnings (losses) of a transferred business before the date of a dropdown transaction should be allocated entirely to the general partner, and the previously reported earnings per unit of the limited partners should not change as a result of the dropdown transaction. The ASU also requires additional disclosures about how the rights to the earnings (losses) differ before and after the dropdown transaction occurs for purposes of computing earnings per unit under the two-class method. This ASU is effective for annual and interim periods beginning in 2016 and is required to be adopted using a retrospective approach, with early adoption permitted. While WGP believes it is currently in compliance with this ASU, it continues to evaluate the impact of the adoption of this ASU on its consolidated financial statements. ASU 2015-03, Interest—Imputation of Interest (Subtopic 835-30)—Simplifying the Presentation of Debt Issuance Costs and ASU 2015-15, Interest—Imputation of Interest (Subtopic 835-30)—Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements . These ASUs will simplify the presentation of debt issuance costs by requiring such costs, except for those related to revolving credit facilities, to be presented in the balance sheet as a direct deduction from the carrying amount of the related debt liability, rather than as an asset. These ASUs are effective for annual and interim periods beginning in 2016 and are required to be adopted using a retrospective approach, with early adoption permitted. WGP does not expect the adoption to have a material impact on its consolidated financial statements. ASU 2015-02, Consolidation—Amendments to the Consolidation Analysis . This ASU will simplify existing requirements by reducing the number of acceptable consolidation models and placing more emphasis on risk of loss when determining a controlling financial interest. The provisions will affect how limited partnerships and similar entities are assessed for consolidation, including the elimination of the presumption that a general partner should consolidate a limited partnership. This ASU is effective for annual and interim periods beginning in 2016 and is required to be adopted using a retrospective or modified retrospective approach, with early adoption permitted. WGP is evaluating the impact of the adoption of this ASU on its consolidated financial statements. ASU 2014-09, Revenue from Contracts with Customers . This ASU supersedes the revenue recognition requirements in Topic 605, Revenue Recognition , and industry-specific guidance in Subtopic 932-605, Extractive Activities—Oil and Gas—Revenue Recognition , and requires an entity to recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration the entity expects to be entitled to in exchange for those goods or services. The effective date for ASU 2014-09 was delayed through the issuance of ASU 2015-14, Revenue from Contracts with Customers—Deferral of the Effective Date, to annual and interim periods beginning in 2018 and is required to be adopted using one of two retrospective application methods, with early adoption permitted in 2017. WGP is evaluating the impact of the adoption of this ASU on its consolidated financial statements.

Description of Business and B21

Description of Business and Basis of Presentation (Tables)	9 Months Ended
	Sep. 30, 2015
Accounting Policies [Abstract]
Assets and Investments Table	As of September 30, 2015 , WES’s assets and investments accounted for under the equity method consisted of the following: Owned and Operated Operated Interests Non-Operated Interests Equity Interests Natural gas gathering systems 12 2 5 2 Natural gas treating facilities 9 4 — 1 Natural gas processing facilities 14 5 — 2 NGL pipelines 3 — — 3 Natural gas pipelines 4 — — — Oil pipelines 1 — — 1
Restatement Tables	The tables below outline the financial statement line items, including the net income (loss) per common unit (basic and diluted), as of and for the three and nine months ended September 30, 2015, that were restated as a result of the correction of this error: Consolidated Statement of Income for the Three Months Ended September 30, 2015 Consolidated Statement of Income for the Nine Months Ended September 30, 2015 thousands except per-unit amounts As Reported Adjustments As Restated As Reported Adjustments As Restated Depreciation and amortization (1) $ 63,351 $ (3,191 ) $ 60,160 $ 190,114 $ (6,399 ) $ 183,715 Impairments (1) 2,337 — 2,337 11,827 264,402 276,229 Operating income (loss) 191,865 3,191 195,056 434,977 (258,003 ) 176,974 Income (loss) before income taxes 164,413 3,191 167,604 365,569 (258,003 ) 107,566 Income tax (benefit) expense 1,661 208 1,869 4,305 (730 ) 3,575 Net income (loss) 162,752 2,983 165,735 361,264 (257,273 ) 103,991 Net income (loss) attributable to Western Gas Equity Partners, LP 88,284 1,087 89,371 213,108 (94,474 ) 118,634 Limited partners’ interest in net income (loss) 88,284 1,087 89,371 211,366 (94,474 ) 116,892 Net income (loss) per common unit – basic and diluted $ 0.40 0.01 $ 0.41 $ 0.97 $ (0.44 ) $ 0.53 (1) “As Reported” amounts previously included as a component of Depreciation, amortization and impairments in WGP’s Original Filing. Consolidated Balance Sheet as of September 30, 2015 thousands As Reported Adjustments As Restated Accumulated depreciation $ 1,072,799 $ 258,003 $ 1,330,802 Net property, plant and equipment 4,789,922 (258,003 ) 4,531,919 Total assets 7,174,004 (258,003 ) 6,916,001 Accrued liabilities 138,985 (233 ) 138,752 Total current liabilities 222,999 (233 ) 222,766 Deferred income taxes 7,037 (497 ) 6,540 Total long-term liabilities 2,897,844 (497 ) 2,897,347 Total liabilities 3,120,843 (730 ) 3,120,113 Common units 1,264,012 (93,737 ) 1,170,275 Total partners’ capital 1,264,012 (93,737 ) 1,170,275 Noncontrolling interests 2,789,149 (163,536 ) 2,625,613 Total equity and partners’ capital 4,053,161 (257,273 ) 3,795,888 Total liabilities, equity and partners’ capital 7,174,004 (258,003 ) 6,916,001 1. DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION (RESTATED) (CONTINUED) Consolidated Statement of Cash Flows for the Nine Months Ended September 30, 2015 thousands As Reported Adjustments As Restated Net income (loss) $ 361,264 $ (257,273 ) $ 103,991 Adjustments to reconcile net income (loss) to net cash provided by operating activities: Depreciation and amortization (1) 190,114 (6,399 ) 183,715 Impairments (1) 11,827 264,402 276,229 Deferred income taxes 2,993 (497 ) 2,496 Increase (decrease) in accounts and natural gas imbalance payables and accrued liabilities, net 16,049 (233 ) 15,816 (1) “As Reported” amounts previously included as a component of Depreciation, amortization and impairments in WGP’s Original Filing.

Acquisitions and Divestitures (

Acquisitions and Divestitures (Tables)	9 Months Ended
	Sep. 30, 2015
Property, Plant and Equipment [Abstract]
Acquisitions Table	The following table presents the acquisitions completed by WES during 2015 and 2014 , and identifies the funding sources for such acquisitions: thousands except unit and percent amounts Acquisition Date Percentage Deferred Purchase Price Borrowings Cash On Hand WES Common Units Issued to Anadarko WES Class C Units Issued to Anadarko TEFR Interests (1) 03/03/2014 Various (1) $ — $ 350,000 $ 6,250 308,490 — DBM (2) 11/25/2014 100 % — 475,000 298,327 — 10,913,853 DBJV system (3) 03/02/2015 50 % 174,276 — — — — (1) WES acquired a 20% interest in each of TEG and TEP and a 33.33% interest in FRP from Anadarko. These assets gather and transport NGLs primarily from the Anadarko and Denver-Julesburg (“DJ”) Basins. The interests in these entities are accounted for under the equity method of accounting. In connection with the issuance of WES common units, WES issued 6,296 general partner units to WES GP in exchange for WES GP’s proportionate capital contribution of $0.4 million . (2) WES acquired Nuevo Midstream, LLC (“Nuevo”) from a third party. Following the acquisition, WES changed the name of Nuevo to Delaware Basin Midstream, LLC (“DBM”). The assets acquired include cryogenic processing plants, a gas gathering system, and related facilities and equipment, which are collectively referred to as the “DBM complex” and serve production from Reeves, Loving and Culberson Counties, Texas and Eddy and Lea Counties, New Mexico. See DBM acquisition below for further information, including the preliminary allocation of the purchase price. (3) WES acquired Anadarko’s interest in Delaware Basin JV Gathering LLC (“DBJV”), which owns a 50% interest in a gathering system and related facilities (the “DBJV system”). The DBJV system is located in the Delaware Basin in Loving, Ward, Winkler and Reeves Counties, Texas. WES will make a cash payment on March 31, 2020, to Anadarko as consideration for the acquisition of DBJV. WES currently estimates the future payment will be $282.8 million , the net present value of which was $174.3 million as of the acquisition date. See DBJV acquisition—Deferred purchase price obligation - Anadarko below.
Impact to Historical Consolidated Statements of Income Table	The following table presents the impact of the DBJV system on revenues and other, equity income, net and net income (loss) as presented in WGP’s historical consolidated statements of income: Three Months Ended September 30, 2014 thousands WGP Historical (1) DBJV System Combined Revenues and other $ 341,282 $ 16,239 $ 357,521 Equity income, net 19,063 — 19,063 Net income (loss) 105,784 6,482 112,266 Nine Months Ended September 30, 2014 thousands WGP Historical (1) DBJV System Combined Revenues and other $ 970,027 $ 46,124 $ 1,016,151 Equity income, net 41,322 — 41,322 Net income (loss) 293,705 14,238 307,943 (1) See Adjustments to Previously Issued Financial Statements in Note 1 .
Purchase Price Allocation Table	The following is the preliminary allocation of the purchase price as of September 30, 2015 , including $3.5 million of post-closing purchase price adjustments, to the assets acquired and liabilities assumed in the DBM acquisition as of the acquisition date, pending final review of certain support related to the acquired entity’s assets and liabilities: thousands Current assets $ 62,940 Property, plant and equipment 467,171 Goodwill 282,697 Other intangible assets 811,048 Accounts payables (18,621 ) Accrued liabilities (37,360 ) Deferred income taxes (1,342 ) Asset retirement obligations and other (9,060 ) Total purchase price $ 1,557,473

Partnership Distributions (Tabl

Partnership Distributions (Tables)	9 Months Ended
	Sep. 30, 2015
Distribution Made to Limited Partner [Line Items]
Cash Distributions Tables	The Board of Directors of WGP GP declared the following cash distributions to WGP unitholders for the periods presented: thousands except per-unit amounts Quarters Ended Total Quarterly Distribution per Unit Total Quarterly Cash Distribution Date of Distribution 2014 March 31 $ 0.25000 $ 54,726 May 2014 June 30 0.27125 59,378 August 2014 September 30 0.29125 63,756 November 2014 December 31 0.31250 68,409 February 2015 2015 March 31 $ 0.34250 $ 74,977 May 2015 June 30 0.36375 79,630 August 2015 September 30 (1) 0.38125 83,461 November 2015 (1) On October 14, 2015 , the Board of Directors of WGP GP declared a cash distribution to WGP unitholders of $0.38125 per unit, or $83.5 million in aggregate. The cash distribution is payable on November 20, 2015 , to WGP unitholders of record at the close of business on November 2, 2015 .
Western Gas Partners, LP [Member]
Distribution Made to Limited Partner [Line Items]
Cash Distributions Tables	The Board of Directors of WES GP declared the following cash distributions to WES’s common and general partner unitholders for the periods presented: thousands except per-unit amounts Quarters Ended Total Quarterly Distribution per Unit Total Quarterly Cash Distribution Date of Distribution 2014 March 31 $ 0.625 $ 98,749 May 2014 June 30 0.650 105,655 August 2014 September 30 0.675 111,608 November 2014 December 31 0.700 126,044 February 2015 2015 March 31 $ 0.725 $ 133,203 May 2015 June 30 0.750 139,736 August 2015 September 30 (1) 0.775 146,160 November 2015 (1) On October 14, 2015 , the Board of Directors of WES GP declared a cash distribution to WES unitholders of $0.775 per unit, or $146.2 million in aggregate, including incentive distributions, but excluding distributions on WES Class C units (see WES Class C unit distributions below). The cash distribution is payable on November 12, 2015 , to WES unitholders of record at the close of business on November 2, 2015 .
PIK Class C Units Distributions Table	WES issued the following PIK Class C units to APC Midstream Holdings, LLC (“AMH”), the holder of the Class C units, for the periods presented: thousands except unit amounts For the Quarters Ended PIK Class C Units Implied Fair Value Date of 2014 December 31 (1) 45,711 $ 3,072 February 2015 2015 March 31 118,230 $ 8,101 May 2015 June 30 153,020 8,721 August 2015 (1) Prorated for the 37 -day period the Class C units were outstanding during the fourth quarter of 2014.

Equity and Partners' Capital (T

Equity and Partners' Capital (Tables)	9 Months Ended
	Sep. 30, 2015
Partners' Capital Notes [Abstract]
Equity Offerings Table	WES completed the following public offerings of its common units during 2015 and 2014, including through its Continuous Offering Programs (“COP”): thousands except unit and per-unit amounts WES Common Units Issued WES GP Units Issued (1) Price Per Unit Underwriting Discount and Other Offering Expenses Net Proceeds to WES 2014 $125.0 million COP (2) 1,133,384 23,132 $ 73.48 $ 1,738 $ 83,245 November 2014 equity offering (3) 8,620,153 153,061 70.85 18,615 602,967 2015 $500.0 million COP (4) 873,525 — $ 66.61 $ 805 $ 57,385 (1) Represents general partner units of WES issued to WES GP in exchange for WES GP’s proportionate capital contribution. (2) Represents common and general partner units of WES issued during the year ended December 31, 2014, pursuant to WES’s registration statement filed with the SEC in August 2012 authorizing the issuance of up to an aggregate of $125.0 million of WES common units (the “$125.0 million COP”). Gross proceeds generated (including WES GP’s proportionate capital contributions) during the year ended December 31, 2014, were $85.0 million . The price per unit in the table above represents an average price for all issuances under the $125.0 million COP during the year ended December 31, 2014. As of December 31, 2014, WES had used all the capacity to issue common units under this registration statement. (3) Includes the issuance of 1,120,153 WES common units pursuant to the partial exercise of the underwriters’ over-allotment option, the net proceeds from which were $77.0 million . Beginning with this partial exercise, WES GP elected not to make a corresponding capital contribution to maintain its 2.0% interest in WES. (4) Represents common units of WES issued during the nine months ended September 30, 2015 , pursuant to WES’s registration statement filed with the SEC in August 2014 authorizing the issuance of up to an aggregate of $500.0 million of WES common units (the “$500.0 million COP”). Gross proceeds generated during the three and nine months ended September 30, 2015 , were zero and $58.2 million , respectively. Commissions paid during the three and nine months ended September 30, 2015 , were zero and $0.6 million , respectively. The price per unit in the table above represents an average price for all issuances under the $500.0 million COP during the nine months ended September 30, 2015 .
Limited Partner and General Partner Units Table	The following table summarizes WES’s common, Class C and general partner units issued during the nine months ended September 30, 2015 : WES Common Units WES Class C Units WES General Partner Units Total Balance at December 31, 2014 127,695,130 10,913,853 2,583,068 141,192,051 PIK Class C units — 316,961 — 316,961 Long-Term Incentive Plan award vestings 5,991 — — 5,991 $500.0 million COP 873,525 — — 873,525 Balance at September 30, 2015 128,574,646 11,230,814 2,583,068 142,388,528

Transactions with Affiliates (T

Transactions with Affiliates (Tables)	9 Months Ended
	Sep. 30, 2015
Related Party Fees and Other Arrangements, Limited Liability Company (LLC) or Limited Partnership (LP) [Abstract]
Commodity Price Swap Agreements Table	Below is a summary of the fixed price ranges on all of WES’s outstanding commodity price swap agreements as of September 30, 2015 : per barrel except natural gas 2015 2016 Ethane $ 18.41 − 23.41 $ 23.11 Propane 47.08 − 52.99 52.90 Isobutane 62.09 − 74.02 73.89 Normal butane 54.62 − 65.04 64.93 Natural gasoline 72.88 − 81.82 81.68 Condensate 76.47 − 81.82 81.68 Natural gas (per MMBtu) 4.66 − 5.96 4.87
Gains (Losses) on Commodity Price Swap Agreements Table	The following table summarizes gains and losses upon settlement of commodity price swap agreements recognized in the consolidated statements of income: Three Months Ended Nine Months Ended thousands 2015 2014 2015 2014 Gains (losses) on commodity price swap agreements related to sales: (1) Natural gas sales $ 5,774 $ 3,179 $ 39,100 $ 1,525 Natural gas liquids sales 33,746 22,737 116,475 66,746 Total 39,520 25,916 155,575 68,271 Losses on commodity price swap agreements related to purchases (2) (23,998 ) (19,533 ) (99,897 ) (38,081 ) Net gains (losses) on commodity price swap agreements $ 15,522 $ 6,383 $ 55,678 $ 30,190 (1) Reported in affiliate natural gas, natural gas liquids and drip condensate sales in the consolidated statements of income in the period in which the related sale is recorded. (2) Reported in cost of product in the consolidated statements of income in the period in which the related purchase is recorded.
Commodity Price Swap Agreements Extensions Table	The table below summarizes the swap prices compared to the forward market prices on the date the commodity price swap extensions were executed. DJ Basin Complex Hugoton System per barrel except natural gas 2015 Swap Prices Market Prices (1) 2015 Swap Prices Market Prices (1) Ethane $ 18.41 $ 1.96 — — Propane 47.08 13.10 — — Isobutane 62.09 19.75 — — Normal butane 54.62 18.99 — — Natural gasoline 72.88 52.59 — — Condensate 76.47 52.59 $ 78.61 $ 32.56 Natural gas (per MMBtu) 5.96 2.75 5.50 2.74 (1) Represents the New York Mercantile Exchange forward strip price as of June 25, 2015, adjusted for location, basis and, in the case of NGLs, transportation and fractionation costs.
Related Party Transactions Tables	The following table summarizes WES’s purchases from and sales to Anadarko of pipe and equipment: Nine Months Ended September 30, 2015 2014 2015 2014 thousands Purchases Sales Cash consideration $ 12,131 $ 16,143 $ 700 $ — Net carrying value 7,411 9,745 366 — Partners’ capital adjustment $ 4,720 $ 6,398 $ 334 $ — The following table summarizes affiliate transactions, which include revenue from affiliates, reimbursement of operating expenses and purchases of natural gas: Three Months Ended Nine Months Ended thousands 2015 2014 2015 2014 Revenues and other (1) $ 247,458 $ 269,632 $ 777,739 $ 769,331 Equity income, net (1) 21,976 19,063 59,137 41,322 Cost of product (1) 35,673 27,034 132,663 85,071 Operation and maintenance (2) 17,662 15,583 50,534 44,961 General and administrative (3) 7,875 7,214 23,154 21,786 Operating expenses 61,210 49,831 206,351 151,818 Interest income (4) 4,225 4,225 12,675 12,675 Interest expense (5) 4,310 — 9,922 — Distributions to WGP unitholders (6) 69,508 52,456 196,177 148,291 Distributions to WES unitholders (7) 568 492 1,648 1,235 (1) Represents amounts earned or incurred on and subsequent to the date of 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. See Adjustments to Previously Issued Financial Statements in Note 1. (2) 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. (3) 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 and WGP by Anadarko (see WES LTIP and WGP LTIP and Anadarko Incentive Plans within this Note 5 ) and amounts charged by Anadarko under the WGP omnibus agreement. (4) Represents interest income recognized on the note receivable from Anadarko. (5) For the three and nine months ended September 30, 2015 , includes WES’s accretion expense recognized on the Deferred purchase price obligation - Anadarko for the acquisition of DBJV (see Note 2 and Note 9 ) and for the nine months ended September 30, 2015 , includes interest expense recognized on the WGP working capital facility (see Note 9 ). (6) Represents distributions paid under WGP’s partnership agreement (see Note 3 and Note 4 ). (7) Represents distributions paid to other subsidiaries of Anadarko under WES’s partnership agreement (see Note 3 and Note 4 ).

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	9 Months Ended
	Sep. 30, 2015
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment Table	A summary of the historical cost of property, plant and equipment is as follows: thousands Estimated Useful Life September 30, 2015 (Restated) December 31, 2014 Land n/a $ 3,191 $ 2,884 Gathering systems 3 to 47 years 5,431,716 4,972,892 Pipelines and equipment 15 to 45 years 136,303 151,107 Assets under construction n/a 272,445 483,347 Other 3 to 40 years 19,066 16,420 Total property, plant and equipment 5,862,721 5,626,650 Accumulated depreciation 1,330,802 1,055,207 Net property, plant and equipment $ 4,531,919 $ 4,571,443

Equity Investments (Tables)

Equity Investments (Tables)	9 Months Ended
	Sep. 30, 2015
Equity Method Investments and Joint Ventures [Abstract]
Equity Investments Table	The following table presents the activity of WES’s equity investments for the nine months ended September 30, 2015 : Equity Investments thousands Fort Union White Cliffs Rendezvous Mont Belvieu JV TEG TEP FRP Total Balance at December 31, 2014 $ 25,933 $ 44,315 $ 56,336 $ 121,337 $ 16,790 $ 198,793 $ 170,988 $ 634,492 Investment earnings (loss), net of amortization 4,831 10,663 1,591 17,256 475 11,691 12,630 59,137 Contributions — 6,081 — (432 ) — 1,520 1,883 9,052 Distributions (4,606 ) (10,227 ) (3,047 ) (17,924 ) (685 ) (11,880 ) (12,276 ) (60,645 ) Distributions in excess of cumulative earnings (1) — (2,584 ) (2,708 ) (1,987 ) (82 ) (4,302 ) (746 ) (12,409 ) Balance at September 30, 2015 $ 26,158 $ 48,248 $ 52,172 $ 118,250 $ 16,498 $ 195,822 $ 172,479 $ 629,627 (1) Distributions in excess of cumulative earnings, classified as investing cash flows in the consolidated statements of cash flows, is calculated on an individual investment basis.

Components of Working Capital (

Components of Working Capital (Tables)	9 Months Ended
	Sep. 30, 2015
Components Of Working Capital [Abstract]
Other Current Assets Table	A summary of other current assets is as follows: thousands September 30, 2015 December 31, 2014 Natural gas liquids inventory $ 6,486 $ 5,316 Natural gas imbalance receivables 177 415 Prepaid insurance 2,732 3,217 Other 2,145 1,893 Total other current assets $ 11,540 $ 10,841
Accrued Liabilities Table	A summary of accrued liabilities is as follows: thousands September 30, 2015 (Restated) December 31, 2014 Accrued capital expenditures $ 70,118 $ 128,856 Accrued plant purchases 26,068 14,023 Accrued interest expense 34,169 24,741 Short-term asset retirement obligations 4,335 1,224 Short-term remediation and reclamation obligations 475 475 Income taxes payable 468 207 Other 3,119 1,338 Total accrued liabilities $ 138,752 $ 170,864

Debt and Interest Expense (Tabl

Debt and Interest Expense (Tables)	9 Months Ended
	Sep. 30, 2015
Debt Instruments [Abstract]
Debt Outstanding and Debt Activity Tables	The following table presents WES and WGP’s outstanding debt as of September 30, 2015 , and December 31, 2014 : September 30, 2015 December 31, 2014 thousands Principal Carrying Value Fair Value (1) Principal Carrying Value Fair Value (1) WGP working capital facility - Anadarko $ — $ — $ — $ 1,150 $ 1,150 $ 1,150 Long-term debt 2021 Notes $ 500,000 $ 496,139 $ 534,860 $ 500,000 $ 495,714 $ 549,530 2022 Notes 670,000 672,662 654,858 670,000 672,930 681,942 2018 Notes 350,000 350,380 350,151 350,000 350,474 352,162 2044 Notes 400,000 393,901 365,196 400,000 393,836 417,619 2025 Notes 500,000 494,107 465,247 — — — WES RCF 180,000 180,000 180,000 510,000 510,000 510,000 Total long-term debt $ 2,600,000 $ 2,587,189 $ 2,550,312 $ 2,430,000 $ 2,422,954 $ 2,511,253 (1) Fair value is measured using the market approach and Level 2 inputs. 9. DEBT AND INTEREST EXPENSE (CONTINUED) Debt activity. The following table presents WES and WGP’s debt activity for the nine months ended September 30, 2015 : thousands Carrying Value Balance at December 31, 2014 $ 2,424,104 WES RCF borrowings 280,000 Issuance of 2025 Notes 500,000 Repayments of WES RCF borrowings (610,000 ) Repayment of WGP working capital facility (1,150 ) Other (5,765 ) Balance at September 30, 2015 $ 2,587,189
Interest Expense Table	The following table summarizes the amounts included in interest expense: Three Months Ended Nine Months Ended thousands 2015 2014 2015 2014 Third parties Long-term debt $ 26,972 $ 21,671 $ 75,047 $ 59,251 Amortization of debt issuance costs and commitment fees 1,530 1,107 4,196 3,799 Capitalized interest (1,039 ) (1,900 ) (6,826 ) (7,347 ) Total interest expense – third parties 27,463 20,878 72,417 55,703 Affiliates WGP WCF — — 2 — Deferred purchase price obligation – Anadarko (1) 4,310 — 9,920 — Total interest expense – affiliates 4,310 — 9,922 — Interest expense $ 31,773 $ 20,878 $ 82,339 $ 55,703 (1) See Note 2 for a discussion of the accretion and present value of the Deferred purchase price obligation - Anadarko.

Description of Business and B30

Description of Business and Basis of Presentation - Asset Table (Details) - Western Gas Partners, LP [Member]	Sep. 30, 2015unit
Operated [Member] | Natural Gas Gathering Systems [Member]
Assets [Line Items]
Assets, number of units	12
Operated [Member] | Natural Gas Treating Facilities [Member]
Assets [Line Items]
Assets, number of units	9
Operated [Member] | Natural Gas Processing Facilities [Member]
Assets [Line Items]
Assets, number of units	14
Operated [Member] | Natural Gas Liquids Pipelines [Member]
Assets [Line Items]
Assets, number of units	3
Operated [Member] | Natural Gas Pipelines [Member]
Assets [Line Items]
Assets, number of units	4
Operated [Member] | Oil Pipelines [Member]
Assets [Line Items]
Assets, number of units	1
Operated Interests [Member] | Natural Gas Gathering Systems [Member]
Assets [Line Items]
Assets, number of units	2
Operated Interests [Member] | Natural Gas Treating Facilities [Member]
Assets [Line Items]
Assets, number of units	4
Operated Interests [Member] | Natural Gas Processing Facilities [Member]
Assets [Line Items]
Assets, number of units	5
Non-Operated Interests [Member] | Natural Gas Gathering Systems [Member]
Assets [Line Items]
Assets, number of units	5
Equity Interests [Member] | Natural Gas Gathering Systems [Member]
Assets [Line Items]
Assets, number of units	2
Equity Interests [Member] | Natural Gas Treating Facilities [Member]
Assets [Line Items]
Assets, number of units	1
Equity Interests [Member] | Natural Gas Processing Facilities [Member]
Assets [Line Items]
Assets, number of units	2
Equity Interests [Member] | Natural Gas Liquids Pipelines [Member]
Assets [Line Items]
Assets, number of units	3
Equity Interests [Member] | Oil Pipelines [Member]
Assets [Line Items]
Assets, number of units	1

Description of Business and B31

Description of Business and Basis of Presentation - Restatement Table - Consolidated Statement of Income (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended				9 Months Ended
		Sep. 30, 2015		Sep. 30, 2014		Sep. 30, 2015		Sep. 30, 2014
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Depreciation and amortization		$ 60,160	[1]	$ 46,379	[2]	$ 183,715	[1],[3]	$ 132,236	[2]
Impairments		2,337	[1]	898	[2]	276,229	[1],[3]	2,431	[2]
Operating income (loss)		195,056		132,692	[2]	176,974		358,321	[2]
Income (loss) before income taxes		167,604		116,157	[2]	107,566		316,142	[2]
Income tax (benefit) expense		1,869		3,891	[2]	3,575		8,199	[2]
Net income (loss)		165,735		112,266	[2]	103,991		307,943	[2]
Net income (loss) attributable to Western Gas Equity Partners, LP		89,371		66,434	[2]	118,634		178,985	[2]
Limited partners' interest in net income (loss)	[4]	89,371		59,952	[2]	116,892		165,703	[2]
As Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Depreciation and amortization	[1]	63,351				190,114	[3]
Impairments	[1]	2,337				11,827	[3]
Operating income (loss)		191,865				434,977
Income (loss) before income taxes		164,413				365,569
Income tax (benefit) expense		1,661				4,305
Net income (loss)		162,752		$ 105,784	[5]	361,264		$ 293,705	[5]
Net income (loss) attributable to Western Gas Equity Partners, LP		88,284				213,108
Limited partners' interest in net income (loss)	[4]	88,284				211,366
Adjustments [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Depreciation and amortization	[1]	(3,191)				(6,399)	[3]
Impairments	[1]	0				264,402	[3]
Operating income (loss)		3,191				(258,003)
Income (loss) before income taxes		3,191				(258,003)
Income tax (benefit) expense		208				(730)
Net income (loss)		2,983				(257,273)
Net income (loss) attributable to Western Gas Equity Partners, LP		1,087				(94,474)
Limited partners' interest in net income (loss)	[4]	$ 1,087				$ (94,474)
Limited Partner [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income (loss) per common unit - basic and diluted		$ 0.41		$ 0.27	[2]	$ 0.53		$ 0.76	[2]
Limited Partner [Member] | As Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income (loss) per common unit - basic and diluted		0.40				0.97
Limited Partner [Member] | Adjustments [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income (loss) per common unit - basic and diluted		$ 0.01				$ (0.44)
[1]	“As Reported” amounts previously included as a component of Depreciation, amortization and impairments in WGP’s Original Filing.
[2]	Financial information has been recast to include the financial position and results attributable to the DBJV system. See Note 1 and Note 2.
[3]	“As Reported” amounts previously included as a component of Depreciation, amortization and impairments in WGP’s Original Filing.
[4]	Represents net income (loss) earned on and subsequent to the date of acquisition of WES assets (as defined in Note 1). See Note 4.
[5]	See Adjustments to Previously Issued Financial Statements in Note 1.

Description of Business and B32

Description of Business and Basis of Presentation - Restatement Table - Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	[1]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accumulated depreciation	$ 1,330,802	$ 1,055,207
Net property, plant and equipment	4,531,919	4,571,443
Total assets	6,916,001	6,955,241
Accrued liabilities	138,752	170,864
Total current liabilities	222,766	241,058
Deferred income taxes	6,540	45,656
Total long-term liabilities	2,897,347	2,580,324
Total liabilities	3,120,113	2,821,382
Common units	1,170,275	1,260,195
Total partners' capital	1,170,275	1,382,704
Noncontrolling interests	2,625,613	2,751,155
Total equity and partners' capital	3,795,888	4,133,859
Total liabilities, equity and partners' capital	6,916,001	$ 6,955,241
As Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accumulated depreciation	1,072,799
Net property, plant and equipment	4,789,922
Total assets	7,174,004
Accrued liabilities	138,985
Total current liabilities	222,999
Deferred income taxes	7,037
Total long-term liabilities	2,897,844
Total liabilities	3,120,843
Common units	1,264,012
Total partners' capital	1,264,012
Noncontrolling interests	2,789,149
Total equity and partners' capital	4,053,161
Total liabilities, equity and partners' capital	7,174,004
Adjustments [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accumulated depreciation	258,003
Net property, plant and equipment	(258,003)
Total assets	(258,003)
Accrued liabilities	(233)
Total current liabilities	(233)
Deferred income taxes	(497)
Total long-term liabilities	(497)
Total liabilities	(730)
Common units	(93,737)
Total partners' capital	(93,737)
Noncontrolling interests	(163,536)
Total equity and partners' capital	(257,273)
Total liabilities, equity and partners' capital	$ (258,003)
[1]	Financial information has been recast to include the financial position and results attributable to the DBJV system. See Note 1 and Note 2.

Description of Business and B33

Description of Business and Basis of Presentation - Restatement Table - Consolidated Statement of Cash Flows (Details) - USD ($) $ in Thousands		3 Months Ended				9 Months Ended
		Sep. 30, 2015		Sep. 30, 2014		Sep. 30, 2015		Sep. 30, 2014
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income (loss)		$ 165,735		$ 112,266	[1]	$ 103,991		$ 307,943	[1]
Depreciation and amortization		60,160	[2]	46,379	[1]	183,715	[2],[3]	132,236	[1]
Impairments		2,337	[2]	898	[1]	276,229	[2],[3]	2,431	[1]
Deferred income taxes						2,496		4,024	[1]
Increase (decrease) in accounts and natural gas imbalance payables and accrued liabilities, net						15,816		34,965	[1]
As Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income (loss)		162,752		$ 105,784	[4]	361,264		$ 293,705	[4]
Depreciation and amortization	[2]	63,351				190,114	[3]
Impairments	[2]	2,337				11,827	[3]
Deferred income taxes						2,993
Increase (decrease) in accounts and natural gas imbalance payables and accrued liabilities, net						16,049
Adjustments [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income (loss)		2,983				(257,273)
Depreciation and amortization	[2]	(3,191)				(6,399)	[3]
Impairments	[2]	$ 0				264,402	[3]
Deferred income taxes						(497)
Increase (decrease) in accounts and natural gas imbalance payables and accrued liabilities, net						$ (233)
[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]	“As Reported” amounts previously included as a component of Depreciation, amortization and impairments in WGP’s Original Filing.
[3]	“As Reported” amounts previously included as a component of Depreciation, amortization and impairments in WGP’s Original Filing.
[4]	See Adjustments to Previously Issued Financial Statements in Note 1.

Description of Business and B34

Description of Business and Basis of Presentation - Additional Information (Details) - USD ($) $ in Thousands

Mar. 02, 2015

[4]

Nov. 30, 2014

Sep. 30, 2015

Sep. 30, 2014

Sep. 30, 2015

Sep. 30, 2014

Impairments

$ 2,337

[1]

$ 898

[2]

$ 276,229

[1],[3]

$ 2,431

[2]

Adjustments [Member]

Impairments

[1]

$ 0

$ 264,402

[3]

Western Gas Partners, LP [Member]

General partner's interest

2.00%

1.80%

Marginal percentage interest in distributions

48.00%

48.00%

Impairments

$ 276,229

Western Gas Partners, LP [Member] | Red Desert Complex [Member]

Impairments

264,400

Western Gas Partners, LP [Member] | Operating Income (Loss) [Member] | Adjustments [Member]

Correction of an immaterial error

$ 12,000

$ 25,000

$ 28,600

Western Gas Partners, LP [Member] | Other Subsidiaries Of Anadarko [Member]

Common units issued

757,619

Western Gas Partners, LP [Member] | Non-Operated Marcellus Interest [Member]

Ownership interest

33.75%

Western Gas Partners, LP [Member] | Anadarko-Operated Marcellus Interest [Member]

Ownership interest

33.75%

Western Gas Partners, LP [Member] | Newcastle [Member]

Ownership interest

50.00%

Western Gas Partners, LP [Member] | Delaware Basin JV Gathering LLC [Member]

Ownership interest

50.00%

50.00%

Western Gas Partners, LP [Member] | Incentive Distribution Rights [Member]

General partner's interest

100.00%

Western Gas Partners, LP [Member] | General Partner [Member]

Ownership interest

100.00%

Western Gas Partners, LP [Member] | Fort Union [Member]

Equity investment ownership

14.81%

14.81%

Western Gas Partners, LP [Member] | Rendezvous [Member]

Equity investment ownership

22.00%

22.00%

Western Gas Partners, LP [Member] | White Cliffs [Member]

Equity investment ownership

10.00%

10.00%

Western Gas Partners, LP [Member] | Mont Belvieu JV [Member]

Equity investment ownership

25.00%

25.00%

Western Gas Partners, LP [Member] | Texas Express Pipeline LLC [Member]

Equity investment ownership

20.00%

20.00%

Western Gas Partners, LP [Member] | Texas Express Gathering LLC [Member]

Equity investment ownership

20.00%

20.00%

Western Gas Partners, LP [Member] | Front Range Pipeline LLC [Member]

Equity investment ownership

33.33%

33.33%

[1]

“As Reported” amounts previously included as a component of Depreciation, amortization and impairments in WGP’s Original Filing.

[2]

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

[3]

“As Reported” amounts previously included as a component of Depreciation, amortization and impairments in WGP’s Original Filing.

[4]

WES acquired Anadarko’s interest in Delaware Basin JV Gathering LLC (“DBJV”), which owns a 50% interest in a gathering system and related facilities (the “DBJV system”). The DBJV system is located in the Delaware Basin in Loving, Ward, Winkler and Reeves Counties, Texas. WES will make a cash payment on March 31, 2020, to Anadarko as consideration for the acquisition of DBJV. WES currently estimates the future payment will be $282.8 million, the net present value of which was $174.3 million as of the acquisition date. See DBJV acquisition—Deferred purchase price obligation - Anadarko below.

Acquisitions and Divestitures -

Acquisitions and Divestitures - Acquisitions Table (Details) - USD ($) $ in Thousands		Mar. 02, 2015		Nov. 25, 2014	Mar. 03, 2014	Nov. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	[1]
Business Acquisition [Line Items]
Borrowings							$ 769,606	$ 1,136,878
Western Gas Partners, LP [Member]
Business Acquisition [Line Items]
Units issued							316,961
Western Gas Partners, LP [Member] | Class C Units [Member]
Business Acquisition [Line Items]
Units issued							316,961
Table Text Block Supplement [Abstract]
Proceeds from the issuance of units						$ 750,000
Western Gas Partners, LP [Member] | General Partner [Member]
Business Acquisition [Line Items]
Percentage acquired							100.00%
Units issued	[2],[3]					153,061
Western Gas Partners, LP [Member] | Texas Express and Front Range [Member]
Business Acquisition [Line Items]
Borrowings	[4]				$ 350,000
Cash on hand	[4]				$ 6,250
Table Text Block Supplement [Abstract]
General partner units issued					6,296
Western Gas Partners, LP [Member] | Texas Express and Front Range [Member] | Common Units [Member]
Business Acquisition [Line Items]
Common units issued	[4]				308,490
Western Gas Partners, LP [Member] | Texas Express and Front Range [Member] | General Partner [Member]
Table Text Block Supplement [Abstract]
Proceeds from the issuance of units					$ 400
Western Gas Partners, LP [Member] | Texas Express Pipeline LLC [Member]
Table Text Block Supplement [Abstract]
Equity investment ownership					20.00%
Western Gas Partners, LP [Member] | Texas Express Gathering LLC [Member]
Table Text Block Supplement [Abstract]
Equity investment ownership					20.00%
Western Gas Partners, LP [Member] | Front Range Pipeline LLC [Member]
Table Text Block Supplement [Abstract]
Equity investment ownership					33.33%
Western Gas Partners, LP [Member] | Delaware Basin Midstream LLC [Member]
Business Acquisition [Line Items]
Percentage acquired	[5]			100.00%
Borrowings	[5]			$ 475,000
Cash on hand	[5]			$ 298,327
Western Gas Partners, LP [Member] | Delaware Basin Midstream LLC [Member] | Class C Units [Member]
Business Acquisition [Line Items]
Units issued	[5]			10,913,853
Western Gas Partners, LP [Member] | Delaware Basin JV Gathering LLC [Member]
Business Acquisition [Line Items]
Percentage acquired		50.00%	[6]				50.00%
Western Gas Partners, LP [Member] | Delaware Basin JV Gathering LLC [Member] | Deferred Purchase Price Obligation - Anadarko [Member] | Level 3 inputs [Member]
Business Acquisition [Line Items]
Deferred purchase price obligation to Anadarko - acquisition date value	[6]	$ 174,276
Table Text Block Supplement [Abstract]
Deferred purchase price obligation to Anadarko - future value		$ 282,800
[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]	Includes the issuance of 1,120,153 WES common units pursuant to the partial exercise of the underwriters’ over-allotment option, the net proceeds from which were $77.0 million. Beginning with this partial exercise, WES GP elected not to make a corresponding capital contribution to maintain its 2.0% interest in WES.
[3]	Represents general partner units of WES issued to WES GP in exchange for WES GP’s proportionate capital contribution.
[4]	WES acquired a 20% interest in each of TEG and TEP and a 33.33% interest in FRP from Anadarko. These assets gather and transport NGLs primarily from the Anadarko and Denver-Julesburg (“DJ”) Basins. The interests in these entities are accounted for under the equity method of accounting. In connection with the issuance of WES common units, WES issued 6,296 general partner units to WES GP in exchange for WES GP’s proportionate capital contribution of $0.4 million.
[5]	WES acquired Nuevo Midstream, LLC (“Nuevo”) from a third party. Following the acquisition, WES changed the name of Nuevo to Delaware Basin Midstream, LLC (“DBM”). The assets acquired include cryogenic processing plants, a gas gathering system, and related facilities and equipment, which are collectively referred to as the “DBM complex” and serve production from Reeves, Loving and Culberson Counties, Texas and Eddy and Lea Counties, New Mexico. See DBM acquisition below for further information, including the preliminary allocation of the purchase price.
[6]	WES acquired Anadarko’s interest in Delaware Basin JV Gathering LLC (“DBJV”), which owns a 50% interest in a gathering system and related facilities (the “DBJV system”). The DBJV system is located in the Delaware Basin in Loving, Ward, Winkler and Reeves Counties, Texas. WES will make a cash payment on March 31, 2020, to Anadarko as consideration for the acquisition of DBJV. WES currently estimates the future payment will be $282.8 million, the net present value of which was $174.3 million as of the acquisition date. See DBJV acquisition—Deferred purchase price obligation - Anadarko below.

Acquisitions and Divestitures36

Acquisitions and Divestitures - Impact to Historical Consolidated Statements of Income Table (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014		Sep. 30, 2015		Sep. 30, 2014
Error Corrections and Prior Period Adjustments Restatement [Line Items]
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]
Net income (loss)		165,735	112,266	[1]	103,991		307,943	[1]
Delaware Basin JV Gathering LLC [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues and other			16,239				46,124
Equity income, net			0				0
Net income (loss)			6,482				14,238
WGP Historical [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues and other	[5]		341,282				970,027
Equity income, net	[5]		19,063				41,322
Net income (loss)		$ 162,752	$ 105,784	[5]	$ 361,264		$ 293,705	[5]
[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 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. 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]	See Adjustments to Previously Issued Financial Statements in Note 1.

Acquisitions and Divestitures37

Acquisitions and Divestitures - Purchase Price Allocation Table (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	[1]
Business Acquisition [Line Items]
Goodwill	$ 387,633	$ 389,087
Western Gas Partners, LP [Member] | Delaware Basin Midstream LLC [Member] | Level 3 inputs [Member]
Business Acquisition [Line Items]
Current assets	62,940
Property, plant and equipment	467,171
Goodwill	282,697
Other intangible assets	811,048
Accounts payables	(18,621)
Accrued liabilities	(37,360)
Deferred income taxes	(1,342)
Asset retirement obligations and other	(9,060)
Total purchase price	$ 1,557,473
[1]	Financial information has been recast to include the financial position and results attributable to the DBJV system. See Note 1 and Note 2.

Acquisitions and Divestitures38

Acquisitions and Divestitures - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	[3]	Sep. 30, 2015	Sep. 30, 2014	[3]	Mar. 02, 2015	Dec. 31, 2014	[2]
Property, Plant and Equipment [Line Items]
Deferred purchase price obligation - Anadarko	[1]	$ 184,196			$ 184,196				$ 0
Gain on divestiture, net		77,244	$ 0		77,244	$ 0
Western Gas Partners, LP [Member] | Dew and Pinnacle Systems [Member]
Property, Plant and Equipment [Line Items]
Proceeds from the sale of assets					146,700
Gain on divestiture, net					77,200
Western Gas Partners, LP [Member] | Delaware Basin Midstream LLC [Member]
Property, Plant and Equipment [Line Items]
Post-closing purchase price adjustments					$ 3,500
Western Gas Partners, LP [Member] | Deferred Purchase Price Obligation - Anadarko [Member] | Delaware Basin JV Gathering LLC [Member]
Property, Plant and Equipment [Line Items]
Discount rate percentage					10.00%
Deferred purchase price obligation - Anadarko		184,200			$ 184,200
Interest expense, related party		$ 4,300			$ 9,900
Level 3 inputs [Member] | Western Gas Partners, LP [Member] | Deferred Purchase Price Obligation - Anadarko [Member] | Delaware Basin JV Gathering LLC [Member]
Property, Plant and Equipment [Line Items]
Deferred purchase price obligation to Anadarko - future value								$ 282,800
Deferred purchase price obligation to Anadarko - acquisition date value	[4]							$ 174,276
[1]	See Note 2.
[2]	Financial information has been recast to include the financial position and results attributable to the DBJV system. See Note 1 and Note 2.
[3]	Financial information has been recast to include the financial position and results attributable to the DBJV system. See Note 1 and Note 2.
[4]	WES acquired Anadarko’s interest in Delaware Basin JV Gathering LLC (“DBJV”), which owns a 50% interest in a gathering system and related facilities (the “DBJV system”). The DBJV system is located in the Delaware Basin in Loving, Ward, Winkler and Reeves Counties, Texas. WES will make a cash payment on March 31, 2020, to Anadarko as consideration for the acquisition of DBJV. WES currently estimates the future payment will be $282.8 million, the net present value of which was $174.3 million as of the acquisition date. See DBJV acquisition—Deferred purchase price obligation - Anadarko below.

Partnership Distributions - Cas

Partnership Distributions - Cash Distributions Tables (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Sep. 30, 2015		Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014
Distribution Made to Limited Partner [Line Items]
Total quarterly distribution per unit	$ 0.38125	[1]	$ 0.36375	$ 0.34250	$ 0.31250	$ 0.29125	$ 0.27125	$ 0.25000
Total quarterly cash distribution	$ 83,461	[1]	$ 79,630	$ 74,977	$ 68,409	$ 63,756	$ 59,378	$ 54,726
Western Gas Partners, LP [Member]
Distribution Made to Limited Partner [Line Items]
Total quarterly distribution per unit	$ 0.775	[2]	$ 0.750	$ 0.725	$ 0.700	$ 0.675	$ 0.650	$ 0.625
Total quarterly cash distribution	$ 146,160	[2]	$ 139,736	$ 133,203	$ 126,044	$ 111,608	$ 105,655	$ 98,749
[1]	On October 14, 2015, the Board of Directors of WGP GP declared a cash distribution to WGP unitholders of $0.38125 per unit, or $83.5 million in aggregate. The cash distribution is payable on November 20, 2015, to WGP unitholders of record at the close of business on November 2, 2015.
[2]	On October 14, 2015, the Board of Directors of WES GP declared a cash distribution to WES unitholders of $0.775 per unit, or $146.2 million in aggregate, including incentive distributions, but excluding distributions on WES Class C units (see WES Class C unit distributions below). The cash distribution is payable on November 12, 2015, to WES unitholders of record at the close of business on November 2, 2015.

Partnership Distributions - PIK

Partnership Distributions - PIK Class C Units Distributions Table (Details) - Western Gas Partners, LP [Member] - Class C Units [Member] - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Distribution Made to Limited Partner [Line Items]
PIK Class C units	153,020	118,230	45,711	[1]
Implied fair value	$ 8,721	$ 8,101	$ 3,072	[1]
Table Text Block Supplement [Abstract]
Number of days in prorated period			37 days
[1]	Prorated for the 37-day period the Class C units were outstanding during the fourth quarter of 2014.

Partnership Distributions - Add

Partnership Distributions - Additional Information (Details)	9 Months Ended
	Sep. 30, 2015
Distribution Made to Limited Partner [Line Items]
Partnership agreement day requirement of distribution of available cash	55 days
Western Gas Partners, LP [Member]
Distribution Made to Limited Partner [Line Items]
Partnership agreement day requirement of distribution of available cash	45 days
Western Gas Partners, LP [Member] | Class C Units [Member]
Distribution Made to Limited Partner [Line Items]
Discount rate percentage	6.00%

Equity and Partners' Capital -

Equity and Partners' Capital - Equity Offerings Table (Details) - Western Gas Partners, LP [Member] - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended
		Nov. 30, 2014	Sep. 30, 2015	Sep. 30, 2015	Dec. 31, 2014	Aug. 31, 2014	Aug. 31, 2012
Capital Unit [Line Items]
Units issued				316,961
Price per unit	[1]	$ 70.85
Underwriting discount and other offering expenses	[1]	$ 18,615
Net proceeds to WES	[1]	$ 602,967
Table Text Block Supplement [Abstract]
General partner's interest		2.00%		1.80%
Option on Securities [Member]
Capital Unit [Line Items]
Net proceeds to WES		$ 77,000
125 Million COP [Member]
Capital Unit [Line Items]
Average price per unit	[2]				$ 73.48
Underwriting discount and other offering expenses	[2]				$ 1,738
Net proceeds to WES	[2]				83,245
Table Text Block Supplement [Abstract]
Maximum aggregate principal of common units							$ 125,000
Gross proceeds					$ 85,000
500 Million COP [Member]
Capital Unit [Line Items]
Common units issued				873,525
Average price per unit	[3]			$ 66.61
Underwriting discount and other offering expenses	[3]		$ 805	$ 805
Net proceeds to WES	[3]			57,385
Table Text Block Supplement [Abstract]
Maximum aggregate principal of common units						$ 500,000
Gross proceeds			0	58,200
Commissions paid			$ 0	$ 600
Common Units [Member]
Capital Unit [Line Items]
Common units issued	[1]	8,620,153
Common Units [Member] | Option on Securities [Member]
Capital Unit [Line Items]
Common units issued		1,120,153
Common Units [Member] | 125 Million COP [Member]
Capital Unit [Line Items]
Common units issued	[2]				1,133,384
Common Units [Member] | 500 Million COP [Member]
Capital Unit [Line Items]
Common units issued	[3]			873,525
General Partner [Member]
Capital Unit [Line Items]
Units issued	[1],[4]	153,061
General Partner [Member] | 125 Million COP [Member]
Capital Unit [Line Items]
Units issued	[2],[4]				23,132
[1]	Includes the issuance of 1,120,153 WES common units pursuant to the partial exercise of the underwriters’ over-allotment option, the net proceeds from which were $77.0 million. Beginning with this partial exercise, WES GP elected not to make a corresponding capital contribution to maintain its 2.0% interest in WES.
[2]	Represents common and general partner units of WES issued during the year ended December 31, 2014, pursuant to WES’s registration statement filed with the SEC in August 2012 authorizing the issuance of up to an aggregate of $125.0 million of WES common units (the “$125.0 million COP”). Gross proceeds generated (including WES GP’s proportionate capital contributions) during the year ended December 31, 2014, were $85.0 million. The price per unit in the table above represents an average price for all issuances under the $125.0 million COP during the year ended December 31, 2014. As of December 31, 2014, WES had used all the capacity to issue common units under this registration statement.
[3]	Represents common units of WES issued during the nine months ended September 30, 2015, pursuant to WES’s registration statement filed with the SEC in August 2014 authorizing the issuance of up to an aggregate of $500.0 million of WES common units (the “$500.0 million COP”). Gross proceeds generated during the three and nine months ended September 30, 2015, were zero and $58.2 million, respectively. Commissions paid during the three and nine months ended September 30, 2015, were zero and $0.6 million, respectively. The price per unit in the table above represents an average price for all issuances under the $500.0 million COP during the nine months ended September 30, 2015.
[4]	Represents general partner units of WES issued to WES GP in exchange for WES GP’s proportionate capital contribution.

Equity and Partners' Capital 43

Equity and Partners' Capital - Limited Partner and General Partner Units Table (Details) - Western Gas Partners, LP [Member] - shares		1 Months Ended	9 Months Ended
		Nov. 30, 2014	Sep. 30, 2015
Capital Unit [Line Items]
Balance			141,192,051
PIK Class C units			316,961
Long-Term Incentive Plan award vestings			5,991
Balance			142,388,528
500 Million COP [Member]
Capital Unit [Line Items]
Offering			873,525
Common Units [Member]
Capital Unit [Line Items]
Balance			127,695,130
Long-Term Incentive Plan award vestings			5,991
Offering	[1]	8,620,153
Balance			128,574,646
Common Units [Member] | 500 Million COP [Member]
Capital Unit [Line Items]
Offering	[2]		873,525
Class C Units [Member]
Capital Unit [Line Items]
Balance			10,913,853
PIK Class C units			316,961
Balance			11,230,814
General Partner [Member]
Capital Unit [Line Items]
Balance			2,583,068
PIK Class C units	[1],[3]	153,061
Balance			2,583,068
[1]	Includes the issuance of 1,120,153 WES common units pursuant to the partial exercise of the underwriters’ over-allotment option, the net proceeds from which were $77.0 million. Beginning with this partial exercise, WES GP elected not to make a corresponding capital contribution to maintain its 2.0% interest in WES.
[2]	Represents common units of WES issued during the nine months ended September 30, 2015, pursuant to WES’s registration statement filed with the SEC in August 2014 authorizing the issuance of up to an aggregate of $500.0 million of WES common units (the “$500.0 million COP”). Gross proceeds generated during the three and nine months ended September 30, 2015, were zero and $58.2 million, respectively. Commissions paid during the three and nine months ended September 30, 2015, were zero and $0.6 million, respectively. The price per unit in the table above represents an average price for all issuances under the $500.0 million COP during the nine months ended September 30, 2015.
[3]	Represents general partner units of WES issued to WES GP in exchange for WES GP’s proportionate capital contribution.

Equity and Partners' Capital 44

Equity and Partners' Capital - Additional Information (Details) $ / shares in Units, $ in Millions		1 Months Ended			9 Months Ended
		Jun. 30, 2015$ / unitshares	Nov. 30, 2014USD ($)$ / sharesshares	Jul. 31, 2014shares	Sep. 30, 2015shares	Dec. 31, 2014shares
Schedule of Investments [Line Items]
Limited partner units owned					218,913,688	218,909,977
Anadarko [Member]
Schedule of Investments [Line Items]
Limited partner units owned					191,087,365
Ownership interest					87.30%
Anadarko [Member] | Common Units [Member]
Schedule of Investments [Line Items]
Common units issued		2,300,000		5,750,000
Anadarko [Member] | Option on Securities [Member] | Common Units [Member]
Schedule of Investments [Line Items]
Common units issued		300,000		750,000
Anadarko [Member] | Tangible Equity Units [Member]
Schedule of Investments [Line Items]
Tangible equity units issued		9,200,000
Tangible equity unit rate		7.50%
Stated amount per tangible equity unit | $ / unit		50
Debt instrument, maturity date		Jun. 7, 2018
Anadarko [Member] | Tangible Equity Units [Member] | Option on Securities [Member]
Schedule of Investments [Line Items]
Tangible equity units issued		1,200,000
Public [Member]
Schedule of Investments [Line Items]
Limited partner units owned					27,826,323
Ownership interest					12.70%
Western Gas Partners, LP [Member]
Schedule of Investments [Line Items]
General partner units owned					2,583,068
General partner's interest			2.00%		1.80%
Units issued					316,961
Price per unit | $ / shares	[1]		$ 70.85
Western Gas Partners, LP [Member] | Common Units [Member]
Schedule of Investments [Line Items]
Limited partner units owned					49,296,205
Ownership interest					34.60%
Common units issued	[1]		8,620,153
Western Gas Partners, LP [Member] | Incentive Distribution Rights [Member]
Schedule of Investments [Line Items]
General partner's interest					100.00%
Western Gas Partners, LP [Member] | Class C Units [Member]
Schedule of Investments [Line Items]
Units issued					316,961
Price per unit | $ / shares			$ 68.72
Proceeds from the issuance of Class C units | $			$ 750
Western Gas Partners, LP [Member] | Class C Units [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Redeemable option on units | $			$ 150
Western Gas Partners, LP [Member] | Option on Securities [Member] | Common Units [Member]
Schedule of Investments [Line Items]
Common units issued			1,120,153
Western Gas Partners, LP [Member] | Public [Member] | Common Units [Member]
Schedule of Investments [Line Items]
Limited partner units owned					78,520,822
Ownership interest					55.20%
Western Gas Partners, LP [Member] | Other Subsidiaries Of Anadarko [Member]
Schedule of Investments [Line Items]
Ownership interest					8.40%
Western Gas Partners, LP [Member] | Other Subsidiaries Of Anadarko [Member] | Common Units [Member]
Schedule of Investments [Line Items]
Limited partner units owned					757,619
Western Gas Partners, LP [Member] | Other Subsidiaries Of Anadarko [Member] | Class C Units [Member]
Schedule of Investments [Line Items]
Limited partner units owned					11,230,814
Units issued			10,913,853
[1]	Includes the issuance of 1,120,153 WES common units pursuant to the partial exercise of the underwriters’ over-allotment option, the net proceeds from which were $77.0 million. Beginning with this partial exercise, WES GP elected not to make a corresponding capital contribution to maintain its 2.0% interest in WES.

Transactions with Affiliates -

Transactions with Affiliates - Commodity Price Swap Agreements Table (Details) - Western Gas Partners, LP [Member]	Sep. 30, 2015$ / bbl$ / MMBTU
Ethane [Member] | Year 2016 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price	23.11
Ethane [Member] | Minimum [Member] | Year 2015 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price	18.41
Ethane [Member] | Maximum [Member] | Year 2015 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price	23.41
Propane [Member] | Year 2016 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price	52.90
Propane [Member] | Minimum [Member] | Year 2015 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price	47.08
Propane [Member] | Maximum [Member] | Year 2015 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price	52.99
Isobutane [Member] | Year 2016 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price	73.89
Isobutane [Member] | Minimum [Member] | Year 2015 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price	62.09
Isobutane [Member] | Maximum [Member] | Year 2015 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price	74.02
Normal butane [Member] | Year 2016 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price	64.93
Normal butane [Member] | Minimum [Member] | Year 2015 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price	54.62
Normal butane [Member] | Maximum [Member] | Year 2015 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price	65.04
Natural gasoline [Member] | Year 2016 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price	81.68
Natural gasoline [Member] | Minimum [Member] | Year 2015 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price	72.88
Natural gasoline [Member] | Maximum [Member] | Year 2015 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price	81.82
Condensate [Member] | Year 2016 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price	81.68
Condensate [Member] | Minimum [Member] | Year 2015 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price	76.47
Condensate [Member] | Maximum [Member] | Year 2015 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price	81.82
Natural gas (per MMBtu) [Member] | Year 2016 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price | $ / MMBTU	4.87
Natural gas (per MMBtu) [Member] | Minimum [Member] | Year 2015 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price | $ / MMBTU	4.66
Natural gas (per MMBtu) [Member] | Maximum [Member] | Year 2015 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price | $ / MMBTU	5.96

Transactions with Affiliates 46

Transactions with Affiliates - Gains (Losses) on Commodity Price Swap Agreements Table (Details) - Western Gas Partners, LP [Member] - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Gains (losses) on commodity price swap agreements related to sales and purchases
Net gains (losses) on commodity price swap agreements		$ 15,522	$ 6,383	$ 55,678	$ 30,190
Sales [Member]
Gains (losses) on commodity price swap agreements related to sales and purchases
Net gains (losses) on commodity price swap agreements	[1]	39,520	25,916	155,575	68,271
Sales [Member] | Natural Gas [Member]
Gains (losses) on commodity price swap agreements related to sales and purchases
Net gains (losses) on commodity price swap agreements	[1]	5,774	3,179	39,100	1,525
Sales [Member] | Natural Gas Liquids [Member]
Gains (losses) on commodity price swap agreements related to sales and purchases
Net gains (losses) on commodity price swap agreements	[1]	33,746	22,737	116,475	66,746
Cost of Sales [Member]
Gains (losses) on commodity price swap agreements related to sales and purchases
Net gains (losses) on commodity price swap agreements	[2]	$ (23,998)	$ (19,533)	$ (99,897)	$ (38,081)
[1]	Reported in affiliate natural gas, natural gas liquids and drip condensate sales in the consolidated statements of income in the period in which the related sale is recorded.
[2]	Reported in cost of product in the consolidated statements of income in the period in which the related purchase is recorded.

Transactions with Affiliates 47

Transactions with Affiliates - Commodity Price Swap Agreements Extensions Table (Details)	Jun. 25, 2015$ / bbl$ / MMBTU
DJ Basin Complex [Member] | Ethane [Member]
Commodity Price Risk Swap [Line Items]
Commodity market price	1.96	[1]
DJ Basin Complex [Member] | Propane [Member]
Commodity Price Risk Swap [Line Items]
Commodity market price	13.10	[1]
DJ Basin Complex [Member] | Isobutane [Member]
Commodity Price Risk Swap [Line Items]
Commodity market price	19.75	[1]
DJ Basin Complex [Member] | Normal butane [Member]
Commodity Price Risk Swap [Line Items]
Commodity market price	18.99	[1]
DJ Basin Complex [Member] | Natural gasoline [Member]
Commodity Price Risk Swap [Line Items]
Commodity market price	52.59	[1]
DJ Basin Complex [Member] | Condensate [Member]
Commodity Price Risk Swap [Line Items]
Commodity market price	52.59	[1]
DJ Basin Complex [Member] | Natural gas (per MMBtu) [Member]
Commodity Price Risk Swap [Line Items]
Commodity market price | $ / MMBTU	2.75	[1]
Hugoton System [Member] | Condensate [Member]
Commodity Price Risk Swap [Line Items]
Commodity market price	32.56	[1]
Hugoton System [Member] | Natural gas (per MMBtu) [Member]
Commodity Price Risk Swap [Line Items]
Commodity market price | $ / MMBTU	2.74	[1]
Western Gas Partners, LP [Member] | DJ Basin Complex [Member] | Ethane [Member] | Year 2015 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price	18.41
Western Gas Partners, LP [Member] | DJ Basin Complex [Member] | Propane [Member] | Year 2015 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price	47.08
Western Gas Partners, LP [Member] | DJ Basin Complex [Member] | Isobutane [Member] | Year 2015 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price	62.09
Western Gas Partners, LP [Member] | DJ Basin Complex [Member] | Normal butane [Member] | Year 2015 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price	54.62
Western Gas Partners, LP [Member] | DJ Basin Complex [Member] | Natural gasoline [Member] | Year 2015 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price	72.88
Western Gas Partners, LP [Member] | DJ Basin Complex [Member] | Condensate [Member] | Year 2015 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price	76.47
Western Gas Partners, LP [Member] | DJ Basin Complex [Member] | Natural gas (per MMBtu) [Member] | Year 2015 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price | $ / MMBTU	5.96
Western Gas Partners, LP [Member] | Hugoton System [Member] | Condensate [Member] | Year 2015 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price	78.61
Western Gas Partners, LP [Member] | Hugoton System [Member] | Natural gas (per MMBtu) [Member] | Year 2015 [Member]
Commodity Price Risk Swap [Line Items]
Commodity swap fixed price | $ / MMBTU	5.50
[1]	Represents the New York Mercantile Exchange forward strip price as of June 25, 2015, adjusted for location, basis and, in the case of NGLs, transportation and fractionation costs.

Transactions with Affiliates 48

Transactions with Affiliates - Equipment Purchases and Sales Table (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Related Party Transaction [Line Items]
Partners’ capital adjustment	$ 4,386	$ 6,398	[1]
Western Gas Partners, LP [Member] | Affiliates [Member] | Purchases [Member]
Related Party Transaction [Line Items]
Cash consideration - purchases	12,131	16,143
Net carrying value	7,411	9,745
Partners’ capital adjustment	4,720	6,398
Western Gas Partners, LP [Member] | Affiliates [Member] | Sales [Member]
Related Party Transaction [Line Items]
Cash consideration - sales	700	0
Net carrying value	366	0
Partners’ capital adjustment	$ (334)	$ 0
[1]	Financial information has been recast to include the financial position and results attributable to the DBJV system. See Note 1 and Note 2.

Transactions with Affiliates 49

Transactions with Affiliates - Summary Table (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014		Sep. 30, 2015		Sep. 30, 2014
Related Party Transaction [Line Items]
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]
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]	10,059	9,116	[1]	30,848		28,193	[1]
Operating expenses		289,265	243,892	[1]	1,149,489		699,152	[1]
Interest income	[6]	4,225	4,225	[1]	12,675		12,675	[1]
Interest expense	[7]	31,773	20,878	[1]	82,339		55,703	[1]
Distributions to unitholders					223,016		164,725	[1]
Affiliates [Member]
Related Party Transaction [Line Items]
Revenues and other	[3]	247,458	269,632	[1]	777,739		769,331	[1]
Cost of product	[3]	35,673	27,034		132,663		85,071
Operation and maintenance	[8]	17,662	15,583		50,534		44,961
General and administrative	[9]	7,875	7,214		23,154		21,786
Operating expenses		61,210	49,831		206,351		151,818
Interest expense	[10]	4,310	0		9,922		0
Affiliates [Member] | Western Gas Equity Partners, LP [Member]
Related Party Transaction [Line Items]
Distributions to unitholders	[11]	69,508	52,456		196,177		148,291
Affiliates [Member] | Western Gas Partners, LP [Member]
Related Party Transaction [Line Items]
Distributions to unitholders	[12]	$ 568	$ 492		$ 1,648		$ 1,235
[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 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. 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 $7.9 million and $23.2 million for the three and nine months ended September 30, 2015, respectively, and $7.2 million and $21.8 million for the three and nine months ended September 30, 2014, respectively. See Note 5.
[6]	Represents interest income recognized on the note receivable from Anadarko.
[7]	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.
[8]	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.
[9]	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 and WGP by Anadarko (see WES LTIP and WGP LTIP and Anadarko Incentive Plans within this Note 5) and amounts charged by Anadarko under the WGP omnibus agreement.
[10]	For the three and nine months ended September 30, 2015, includes WES’s accretion expense recognized on the Deferred purchase price obligation - Anadarko for the acquisition of DBJV (see Note 2 and Note 9) and for the nine months ended September 30, 2015, includes interest expense recognized on the WGP working capital facility (see Note 9).
[11]	Represents distributions paid under WGP’s partnership agreement (see Note 3 and Note 4).
[12]	Represents distributions paid to other subsidiaries of Anadarko under WES’s partnership agreement (see Note 3 and Note 4).

Transactions with Affiliates 50

Transactions with Affiliates - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended
	May. 31, 2008	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015		Sep. 30, 2014	Dec. 31, 2014
Related Party Transaction [Line Items]
Note receivable - Anadarko		$ 260,000,000		$ 260,000,000			$ 260,000,000	[1]
Above-market component of swap extensions with Anadarko		7,916,000		7,916,000	[2]
Contributions of equity-based compensation to WES by Anadarko				$ 2,617,000
Western Gas Equity Partners Long Term Incentive Plan [Member]
Related Party Transaction [Line Items]
Units vesting period				3 years
Equity-based compensation expense		56,000	$ 57,000	$ 200,000		$ 100,000
Independent Director [Member] | Western Gas Equity Partners Long Term Incentive Plan [Member]
Related Party Transaction [Line Items]
Units vesting period				1 year
Western Gas Partners, LP [Member] | Western Gas Equity Partners Long Term Incentive Plan [Member] | Anadarko Incentive Plans [Member]
Related Party Transaction [Line Items]
Equity-based compensation expense		1,000,000	900,000	$ 3,100,000		2,700,000
Contributions of equity-based compensation to WES by Anadarko				$ 2,700,000
Western Gas Partners, LP [Member] | Western Gas Partners Long Term Incentive Plan [Member]
Related Party Transaction [Line Items]
Units vesting period				3 years
Equity-based compensation expense		$ 100,000	$ 200,000	$ 400,000		$ 500,000
Western Gas Partners, LP [Member] | Gathering, Treating and Transportation [Member]
Related Party Transaction [Line Items]
Affiliate throughput percent		42.00%	48.00%	46.00%		49.00%
Western Gas Partners, LP [Member] | Processing [Member]
Related Party Transaction [Line Items]
Affiliate throughput percent		47.00%	58.00%	51.00%		58.00%
Western Gas Partners, LP [Member] | Affiliates [Member]
Related Party Transaction [Line Items]
Note receivable - Anadarko	$ 260,000,000
Note receivable, due date	May 14, 2038
Fixed annual rate for note receivable bearing interest	6.50%
Western Gas Partners, LP [Member] | Affiliates [Member] | Level 2 inputs [Member] | Market approach valuation technique [Member]
Related Party Transaction [Line Items]
Fair value of the note receivable		$ 288,900,000		$ 288,900,000			$ 317,800,000
Western Gas Partners, LP [Member] | Independent Director [Member] | Western Gas Partners Long Term Incentive Plan [Member]
Related Party Transaction [Line Items]
Units vesting period				1 year
[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]	See Note 5.

Property, Plant and Equipment -

Property, Plant and Equipment - Historical Cost Table (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 5,862,721	$ 5,626,650	[1]
Accumulated depreciation	1,330,802	1,055,207	[1]
Net property, plant and equipment	4,531,919	4,571,443	[1]
Western Gas Partners, LP [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	3,191	2,884
Western Gas Partners, LP [Member] | Gathering Systems [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 5,431,716	4,972,892
Western Gas Partners, LP [Member] | Gathering Systems [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Western Gas Partners, LP [Member] | Gathering Systems [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	47 years
Western Gas Partners, LP [Member] | Pipelines And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 136,303	151,107
Western Gas Partners, LP [Member] | Pipelines And Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	15 years
Western Gas Partners, LP [Member] | Pipelines And Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	45 years
Western Gas Partners, LP [Member] | Assets Under Construction [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 272,445	483,347
Western Gas Partners, LP [Member] | Other [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 19,066	$ 16,420
Western Gas Partners, LP [Member] | Other [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Western Gas Partners, LP [Member] | Other [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	40 years
[1]	Financial information has been recast to include the financial position and results attributable to the DBJV system. See Note 1 and Note 2.

Property, Plant and Equipment52

Property, Plant and Equipment - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2015		Sep. 30, 2014	[2]	Sep. 30, 2015		Sep. 30, 2014	[2]
Property, Plant and Equipment [Line Items]
Impairments	$ 2,337	[1]	$ 898		$ 276,229	[1],[3]	$ 2,431
Western Gas Partners, LP [Member]
Property, Plant and Equipment [Line Items]
Impairments					276,229
Western Gas Partners, LP [Member] | Red Desert Complex [Member]
Property, Plant and Equipment [Line Items]
Impairments					264,400
Western Gas Partners, LP [Member] | Red Desert Complex [Member] | Fair Value Measurements Nonrecurring [Member] | Level 3 inputs [Member] | Income Approach Valuation Technique [Member]
Property, Plant and Equipment [Line Items]
Estimated fair value	$ 23,200				23,200
Western Gas Partners, LP [Member] | Other [Member]
Property, Plant and Equipment [Line Items]
Impairments					$ 11,800
[1]	“As Reported” amounts previously included as a component of Depreciation, amortization and impairments in WGP’s Original Filing.
[2]	Financial information has been recast to include the financial position and results attributable to the DBJV system. See Note 1 and Note 2.
[3]	“As Reported” amounts previously included as a component of Depreciation, amortization and impairments in WGP’s Original Filing.

Equity Investments - Equity Inv

Equity Investments - Equity Investments Table (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	[4]	Sep. 30, 2015		Sep. 30, 2014	[4]
Schedule of Equity Method Investments [Line Items]
Balance	[1]				$ 634,492
Investment earnings (loss), net of amortization	[2],[3]	$ 21,976	$ 19,063		59,137	[5]	$ 41,322	[5]
Contributions					9,052		63,267
Distributions	[5]				(60,645)		(43,061)
Distributions in excess of cumulative earnings	[5]				(12,409)	[6]	$ (14,387)
Balance		629,627			629,627
Western Gas Partners, LP [Member] | Fort Union [Member]
Schedule of Equity Method Investments [Line Items]
Balance					25,933
Investment earnings (loss), net of amortization					4,831
Contributions					0
Distributions					(4,606)
Distributions in excess of cumulative earnings	[6]				0
Balance		26,158			26,158
Western Gas Partners, LP [Member] | White Cliffs [Member]
Schedule of Equity Method Investments [Line Items]
Balance					44,315
Investment earnings (loss), net of amortization					10,663
Contributions					6,081
Distributions					(10,227)
Distributions in excess of cumulative earnings	[6]				(2,584)
Balance		48,248			48,248
Western Gas Partners, LP [Member] | Rendezvous [Member]
Schedule of Equity Method Investments [Line Items]
Balance					56,336
Investment earnings (loss), net of amortization					1,591
Contributions					0
Distributions					(3,047)
Distributions in excess of cumulative earnings	[6]				(2,708)
Balance		52,172			52,172
Western Gas Partners, LP [Member] | Mont Belvieu JV [Member]
Schedule of Equity Method Investments [Line Items]
Balance					121,337
Investment earnings (loss), net of amortization					17,256
Contributions					(432)
Distributions					(17,924)
Distributions in excess of cumulative earnings	[6]				(1,987)
Balance		118,250			118,250
Western Gas Partners, LP [Member] | Texas Express Gathering LLC [Member]
Schedule of Equity Method Investments [Line Items]
Balance					16,790
Investment earnings (loss), net of amortization					475
Contributions					0
Distributions					(685)
Distributions in excess of cumulative earnings	[6]				(82)
Balance		16,498			16,498
Western Gas Partners, LP [Member] | Texas Express Pipeline LLC [Member]
Schedule of Equity Method Investments [Line Items]
Balance					198,793
Investment earnings (loss), net of amortization					11,691
Contributions					1,520
Distributions					(11,880)
Distributions in excess of cumulative earnings	[6]				(4,302)
Balance		195,822			195,822
Western Gas Partners, LP [Member] | Front Range Pipeline LLC [Member]
Schedule of Equity Method Investments [Line Items]
Balance					170,988
Investment earnings (loss), net of amortization					12,630
Contributions					1,883
Distributions					(12,276)
Distributions in excess of cumulative earnings	[6]				(746)
Balance		$ 172,479			$ 172,479
[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 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. See Adjustments to Previously Issued Financial Statements in Note 1.
[4]	Financial information has been recast to include the financial position and results attributable to the DBJV system. See Note 1 and Note 2.
[5]	Income earned on, distributions from and contributions to equity investments are classified as affiliate. See Note 1.
[6]	Distributions in excess of cumulative earnings, classified as investing cash flows in the consolidated statements of cash flows, is calculated on an individual investment basis.

Components of Working Capital -

Components of Working Capital - Other Current Assets Table (Details) - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Other Current Assets [Line Items]
Natural gas liquids inventory		$ 6,486	$ 5,316
Natural gas imbalance receivables		177	415
Prepaid insurance		2,732	3,217
Other		2,145	1,893
Total other current assets	[1]	$ 11,540	$ 10,841	[2]
[1]	Other current assets includes natural gas imbalance receivables from affiliates of zero and $0.2 million as of September 30, 2015, and December 31, 2014, respectively.
[2]	Financial information has been recast to include the financial position and results attributable to the DBJV system. See Note 1 and Note 2.

Components of Working Capital55

Components of Working Capital - Accrued Liabilities Table (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Accrued Liabilities [Line Items]
Accrued interest expense	$ 34,169	$ 24,741
Short-term asset retirement obligations	4,335	1,224
Short-term remediation and reclamation obligations	475	475
Income taxes payable	468	207
Total accrued liabilities	138,752	170,864	[1]
Accrued Capital Expenditures [Member]
Accrued Liabilities [Line Items]
Other accrued liabilities	70,118	128,856
Accrued Plant Purchases [Member]
Accrued Liabilities [Line Items]
Other accrued liabilities	26,068	14,023
Other Accrued Liabilities [Member]
Accrued Liabilities [Line Items]
Other accrued liabilities	$ 3,119	$ 1,338
[1]	Financial information has been recast to include the financial position and results attributable to the DBJV system. See Note 1 and Note 2.

Debt and Interest Expense - Deb

Debt and Interest Expense - Debt Outstanding Table (Details) - USD ($)		Sep. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Total long-term debt principal		$ 2,600,000,000	$ 2,430,000,000
Carrying value		2,587,189,000	2,422,954,000	[1]
Market approach valuation technique [Member] | Level 2 inputs [Member]
Debt Instrument [Line Items]
Fair value	[2]	2,550,312,000	2,511,253,000
Anadarko [Member]
Debt Instrument [Line Items]
WGP working capital facility - Anadarko		0	1,150,000	[1]
Anadarko [Member] | Working Capital Facility [Member]
Debt Instrument [Line Items]
Principal		0	1,150,000
WGP working capital facility - Anadarko		0	1,150,000
Anadarko [Member] | Working Capital Facility [Member] | Market approach valuation technique [Member] | Level 2 inputs [Member]
Debt Instrument [Line Items]
Fair value	[2]	0	1,150,000
Western Gas Partners, LP [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Principal		180,000,000	510,000,000
Carrying value		180,000,000	510,000,000
Western Gas Partners, LP [Member] | Revolving Credit Facility [Member] | Market approach valuation technique [Member] | Level 2 inputs [Member]
Debt Instrument [Line Items]
Fair value	[2]	180,000,000	510,000,000
Western Gas Partners, LP [Member] | Senior Notes [Member] | 5.375% Senior Notes due 2021 [Member]
Debt Instrument [Line Items]
Principal		500,000,000	500,000,000
Carrying value		496,139,000	495,714,000
Western Gas Partners, LP [Member] | Senior Notes [Member] | 5.375% Senior Notes due 2021 [Member] | Market approach valuation technique [Member] | Level 2 inputs [Member]
Debt Instrument [Line Items]
Fair value	[2]	534,860,000	549,530,000
Western Gas Partners, LP [Member] | Senior Notes [Member] | 4.000% Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Principal		670,000,000	670,000,000
Carrying value		672,662,000	672,930,000
Western Gas Partners, LP [Member] | Senior Notes [Member] | 4.000% Senior Notes due 2022 [Member] | Market approach valuation technique [Member] | Level 2 inputs [Member]
Debt Instrument [Line Items]
Fair value	[2]	654,858,000	681,942,000
Western Gas Partners, LP [Member] | Senior Notes [Member] | 2.600% Senior Notes due 2018 [Member]
Debt Instrument [Line Items]
Principal		350,000,000	350,000,000
Carrying value		350,380,000	350,474,000
Western Gas Partners, LP [Member] | Senior Notes [Member] | 2.600% Senior Notes due 2018 [Member] | Market approach valuation technique [Member] | Level 2 inputs [Member]
Debt Instrument [Line Items]
Fair value	[2]	350,151,000	352,162,000
Western Gas Partners, LP [Member] | Senior Notes [Member] | 5.450% Senior Notes due 2044 [Member]
Debt Instrument [Line Items]
Principal		400,000,000	400,000,000
Carrying value		393,901,000	393,836,000
Western Gas Partners, LP [Member] | Senior Notes [Member] | 5.450% Senior Notes due 2044 [Member] | Market approach valuation technique [Member] | Level 2 inputs [Member]
Debt Instrument [Line Items]
Fair value	[2]	365,196,000	417,619,000
Western Gas Partners, LP [Member] | Senior Notes [Member] | 3.950% Senior Notes due 2025 [Member]
Debt Instrument [Line Items]
Principal		500,000,000	0
Carrying value		494,107,000	0
Western Gas Partners, LP [Member] | Senior Notes [Member] | 3.950% Senior Notes due 2025 [Member] | Market approach valuation technique [Member] | Level 2 inputs [Member]
Debt Instrument [Line Items]
Fair value	[2]	$ 465,247,000	$ 0
[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]	Fair value is measured using the market approach and Level 2 inputs.

Debt and Interest Expense - D57

Debt and Interest Expense - Debt Activity Table (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2015USD ($)
Debt Instrument [Line Items]
Beginning balance	$ 2,424,104
Ending balance	2,587,189
Working Capital Facility [Member] | Anadarko [Member]
Debt Instrument [Line Items]
Repayments	(1,150)
Western Gas Partners, LP [Member]
Debt Instrument [Line Items]
Other	(5,765)
Western Gas Partners, LP [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Borrowings	280,000
Repayments	(610,000)
Western Gas Partners, LP [Member] | Senior Notes [Member] | 3.950% Senior Notes due 2025 [Member]
Debt Instrument [Line Items]
Issuance of Senior Notes	$ 500,000

Debt and Interest Expense - Int

Debt and Interest Expense - Interest Expense Table (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014		Sep. 30, 2015	Sep. 30, 2014
Debt Instrument [Line Items]
Interest expense	[1]	$ 31,773	$ 20,878	[2]	$ 82,339	$ 55,703	[2]
Third Parties [Member]
Debt Instrument [Line Items]
Interest expense		27,463	20,878		72,417	55,703
Affiliates [Member]
Debt Instrument [Line Items]
Interest expense	[3]	4,310	0		9,922	0
Anadarko [Member] | Working Capital Facility [Member]
Debt Instrument [Line Items]
Interest expense, related party		0	0		2	0
Western Gas Partners, LP [Member] | Third Parties [Member]
Debt Instrument [Line Items]
Long-term debt		26,972	21,671		75,047	59,251
Amortization of debt issuance costs and commitment fees		1,530	1,107		4,196	3,799
Capitalized interest		(1,039)	(1,900)		(6,826)	(7,347)
Western Gas Partners, LP [Member] | Affiliates [Member] | Deferred Purchase Price Obligation - Anadarko [Member]
Debt Instrument [Line Items]
Interest expense, related party	[4]	$ 4,310	$ 0		$ 9,920	$ 0
[1]	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.
[2]	Financial information has been recast to include the financial position and results attributable to the DBJV system. See Note 1 and Note 2.
[3]	For the three and nine months ended September 30, 2015, includes WES’s accretion expense recognized on the Deferred purchase price obligation - Anadarko for the acquisition of DBJV (see Note 2 and Note 9) and for the nine months ended September 30, 2015, includes interest expense recognized on the WGP working capital facility (see Note 9).
[4]	See Note 2 for a discussion of the accretion and present value of the Deferred purchase price obligation - Anadarko.

Debt and Interest Expense - Add

Debt and Interest Expense - Additional Information (Details) - USD ($)	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Jun. 30, 2015	Nov. 01, 2012
Working Capital Facility [Member] | Anadarko [Member]
Debt Instrument [Line Items]
Facility, interest rate at period end	1.69%	1.66%
Facility, outstanding borrowings	$ 0
Facility, available borrowing capacity	$ 30,000,000
Facility, maximum borrowing capacity				$ 30,000,000
Facility, expiration date	Nov. 1, 2017
Western Gas Partners, LP [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Facility, interest rate at period end	1.49%	1.46%
Facility, fee rate	0.20%	0.20%
Facility, outstanding borrowings	$ 180,000,000
Outstanding letters of credit	12,800,000
Facility, available borrowing capacity	$ 1,000,000,000
Facility, expiration date	Feb. 26, 2019
Western Gas Partners, LP [Member] | Senior Notes [Member] | 5.375% Senior Notes due 2021 [Member]
Debt Instrument [Line Items]
Fixed interest rate	5.375%
Debt instrument, maturity date	Jun. 1, 2021
Western Gas Partners, LP [Member] | Senior Notes [Member] | 4.000% Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Fixed interest rate	4.00%
Debt instrument, maturity date	Jul. 1, 2022
Western Gas Partners, LP [Member] | Senior Notes [Member] | 2.600% Senior Notes due 2018 [Member]
Debt Instrument [Line Items]
Fixed interest rate	2.60%
Debt instrument, maturity date	Aug. 15, 2018
Western Gas Partners, LP [Member] | Senior Notes [Member] | 5.450% Senior Notes due 2044 [Member]
Debt Instrument [Line Items]
Fixed interest rate	5.45%
Debt instrument, maturity date	Apr. 1, 2044
Western Gas Partners, LP [Member] | Senior Notes [Member] | 3.950% Senior Notes due 2025 [Member]
Debt Instrument [Line Items]
Fixed interest rate	3.95%
Offering Percent			98.789%
Effective interest rate	4.205%
Underwriting discount	$ 3,300,000
Debt instrument, maturity date	Jun. 1, 2025

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) - Western Gas Partners, LP [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Loss Contingencies [Line Items]
Committed capital	$ 42		$ 42
Rent expense associated with office, warehouse and equipment leases	$ 4.9	$ 2.4	$ 13.6	$ 6.8