Goodwill and Intangibles - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment	$ 0
Amortization expense for intangible assets	28,400,000	$ 28,200,000	$ 4,300,000
Estimated amortization expense for intangible assets in 2017	28,400,000
Estimated amortization expense for intangible assets in 2018	28,400,000
Estimated amortization expense for intangible assets in 2019	28,400,000
Estimated amortization expense for intangible assets in 2020	28,400,000
Estimated amortization expense for intangible assets in 2021	$ 28,400,000
Western Gas Partners, LP [Member] | Platte Valley [Member]
Finite-Lived Intangible Assets [Line Items]
Straight-line basis of amortization	50 years
Western Gas Partners, LP [Member] | Chipeta Processing LLC [Member]
Finite-Lived Intangible Assets [Line Items]
Straight-line basis of amortization	10 years
Western Gas Partners, LP [Member] | Delaware Basin Midstream LLC [Member]
Finite-Lived Intangible Assets [Line Items]
Straight-line basis of amortization	30 years