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Partnership Distributions - Additional Information (Details) - $ / shares
3 Months Ended 12 Months Ended
May 02, 2017
Mar. 01, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
[1]
Mar. 31, 2016
[2]
Dec. 31, 2017
Distribution Made to Limited Partner [Line Items]                
Partnership agreement day requirement of distribution of available cash               55 days
Western Gas Partners, LP [Member]                
Distribution Made to Limited Partner [Line Items]                
Partnership agreement day requirement of distribution of available cash               45 days
Incentive distributions percentage               48.00%
Western Gas Partners, LP [Member] | Minimum [Member]                
Distribution Made to Limited Partner [Line Items]                
Distribution sharing percentage               1.50%
Western Gas Partners, LP [Member] | Maximum [Member]                
Distribution Made to Limited Partner [Line Items]                
Distribution sharing percentage               49.50%
Western Gas Partners, LP [Member] | Class C Units [Member]                
Distribution Made to Limited Partner [Line Items]                
Discount rate percentage               6.00%
Western Gas Partners, LP [Member] | Series A Preferred Units [Member]                
Distribution Made to Limited Partner [Line Items]                
Series A Preferred units quarterly distribution per unit     $ 0.68 $ 0.68 $ 0.68 $ 0.68 $ 0.68  
Western Gas Partners, LP [Member] | Series A Preferred Units [Member] | Series A Preferred Units March 2017 Conversion [Member]                
Distribution Made to Limited Partner [Line Items]                
Series A Preferred units, percentage converted   50.00%            
Series A Preferred units, common units issued upon conversion   1            
Western Gas Partners, LP [Member] | Series A Preferred Units [Member] | Series A Preferred Units May 2017 Conversion [Member]                
Distribution Made to Limited Partner [Line Items]                
Series A Preferred units, percentage converted 50.00%              
Series A Preferred units, common units issued upon conversion 1              
[1] Full quarterly per unit distribution on 14,030,611 WES Series A Preferred units and quarterly per unit distribution prorated for the 77-day period during which 7,892,220 WES Series A Preferred units were outstanding during the second quarter of 2016.
[2] Quarterly per unit distribution prorated for the 18-day period during which 14,030,611 WES Series A Preferred units were outstanding during the first quarter of 2016.