Transactions With Affiliates - Equipment Purchases and Sales Table (details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Related Party Transaction [Line Items]
Partners' capital adjustment	$ 348	$ (43)	[1]
Western Gas Partners [Member] | Affiliated Entity [Member] | Purchases [Member]
Related Party Transaction [Line Items]
Consideration given for equipment	1,128	4,702
Net carrying value	780	4,745
Partners' capital adjustment	$ 348	$ (43)

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