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Transactions With Affiliates - Equipment Purchases and Sales Table (details) - USD ($)
$ in Thousands
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.