Transactions with Affiliates - Equipment Purchases and Sales Table (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Related Party Transaction [Line Items]
Partners’ capital adjustment	$ 581	$ 4,250	[1]
Western Gas Partners, LP [Member] | Affiliates [Member] | Purchases [Member]
Related Party Transaction [Line Items]
Cash consideration - purchases	3,965	10,369
Net carrying value	3,366	5,785
Partners’ capital adjustment	599	4,584
Western Gas Partners, LP [Member] | Affiliates [Member] | Sales [Member]
Related Party Transaction [Line Items]
Cash consideration - sales	623	700
Net carrying value	(605)	(366)
Partners’ capital adjustment	$ (18)	$ (334)

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