Partnership Distributions - PIK Class C Units Distributions Table (Details) - Western Gas Partners, LP [Member] - Class C Units [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Distribution Made to Limited Partner [Line Items]
PIK Class C units	118,230	45,711	[1]
Implied fair value	$ 8,101	$ 3,072	[1]
Table Text Block Supplement [Abstract]
Number of days in prorated period		37 days

[1] Prorated for the 37-day period the Class C units were outstanding during the fourth quarter of 2014.