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8/1/2010 - 8/31/2010
USD ($)
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12/31/2010
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{us-gaap_DebtInstrumentAxis} : Western Gas Partners Limited Partnership [Member]
12/31/2010
USD ($)

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 -Section 02
 -Paragraph 19, 22
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 -Publisher SEC
 -Name Regulation S-X (SX)
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 -Section 02
 -Paragraph 19, 22
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 -Publisher SEC
 -Name Regulation S-X (SX)
 -Number 210
 -Section 02
 -Paragraph 22
 -Article 5

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8/1/2010 - 8/31/2010
USD ($)
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{us-gaap_DebtInstrumentAxis} : Western Gas Partners Limited Partnership [Member]
12/31/2010
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interest compounding and original issue discount or premium.</ElementDefenition><ElementReferences>Reference 1: http://www.xbrl.org/2003/role/presentationRef
 -Publisher SEC
 -Name Regulation S-X (SX)
 -Number 210
 -Section 02
 -Paragraph 22
 -Article 5

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 -Publisher SEC
 -Name Regulation S-X (SX)
 -Number 210
 -Section 08
 -Paragraph f
 -Article 4

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