Transactions with Affiliates - Equipment Purchases and Sales Table (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Related Party Transaction [Line Items]
Partners’ capital adjustment	$ 354	$ 4,540	[1]
Western Gas Partners, LP [Member] | Affiliates [Member] | Purchases [Member]
Related Party Transaction [Line Items]
Cash consideration - purchases	2,699	9,056
Net carrying value	2,328	4,182
Partners’ capital adjustment	371	4,874
Western Gas Partners, LP [Member] | Affiliates [Member] | Sales [Member]
Related Party Transaction [Line Items]
Cash consideration - sales	613	700
Net carrying value	596	366
Partners’ capital adjustment	$ (17)	$ (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.