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Consolidated Statements of Income (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Revenues    
Total revenues $ 229,747 $ 224,676 [1]
Operating expenses    
Cost of product 83,083 [2] 83,156 [1],[2]
Operation and maintenance 36,739 [2] 32,121 [1],[2]
General and administrative 8,929 [2] 10,274 [1],[2]
Property and other taxes 5,785 4,837 [1]
Depreciation, amortization and impairments 32,440 27,067 [1]
Total operating expenses 166,976 157,455 [1]
Operating income 62,771 67,221 [1]
Interest income, net - affiliates 4,225 [3] 4,225 [1],[3]
Interest expense (11,811) [4] (9,581) [1],[4]
Other income (expense), net 727 458 [1]
Income before income taxes 55,912 62,323 [1]
Income tax expense 4,236 16,695 [1]
Net income 51,676 45,628 [1]
Net income attributable to noncontrolling interests 19,361 28,574 [1]
Net income attributable to Western Gas Equity Partners, LP 32,315 17,054 [1]
Limited partners' interest in net income:    
Pre-acquisition net (income) loss allocated to Anadarko (4,567)  
Common [Member]
   
Limited partners' interest in net income:    
Weighted average units outstanding - basic and diluted 218,896  
Affiliated Entity Member
   
Revenues    
Gathering, processing and transportation of natural gas and natural gas liquids 65,899 61,119 [1]
Natural gas, natural gas liquids and condensate sales 111,670 105,653 [1]
Equity income and Other, net 3,981 4,001 [1]
Total revenues 181,550 [5] 170,773 [1],[5]
Operating expenses    
Cost of product 31,929 [5] 33,426 [5]
Operation and maintenance 13,366 [6] 12,473 [6]
General and administrative 6,088 [7] 8,833 [7]
Total operating expenses 51,383 54,732
Interest expense   (1,315) [8]
Third Parties [Member]
   
Revenues    
Gathering, processing and transportation of natural gas and natural gas liquids 36,991 30,470 [1]
Natural gas, natural gas liquids and condensate sales 10,059 22,833 [1]
Equity income and Other, net 1,147 600 [1]
Total revenues 48,197 53,903 [1]
Operating expenses    
Interest expense (11,811) (8,266)
Limited Partners Member
   
Limited partners' interest in net income:    
Limited partners' interest in net income $ 27,748 [9]  
Limited Partners Member | Common [Member]
   
Limited partners' interest in net income:    
Net income per unit - basic and diluted $ 0.13  
[1] Financial information has been recast to include the financial position and results attributable to the Non-Operated Marcellus Interest. See Note 2.
[2] Cost of product includes product purchases from Anadarko (as defined in Note 1) of $31.9 million and $33.4 million for the three months ended March 31, 2013 and 2012, respectively. Operation and maintenance includes charges from Anadarko of $13.4 million and $12.5 million for the three months ended March 31, 2013 and 2012, respectively. General and administrative includes charges from Anadarko of $6.1 million and $8.8 million for the three months ended March 31, 2013 and 2012, respectively. See Note 5.
[3] Represents interest income recognized on the note receivable from Anadarko.
[4] Includes affiliate (as defined in Note 1) interest expense of zero and $1.3 million for the three months ended March 31, 2013 and 2012, respectively. See Note 8.
[5] Represents amounts recognized under gathering, treating or processing agreements, and purchase and sale agreements.
[6] Represents expenses incurred during periods including and subsequent to the date of the acquisition of WES assets, as well as expenses incurred by Anadarko on a historical basis related to WES assets prior to the acquisition of such assets by WES.
[7] Represents general and administrative expense incurred during periods including and subsequent to the date of WES’s acquisition of WES assets, as well as a management services fee for reimbursement of expenses incurred by Anadarko for periods prior to the acquisition of WES assets by WES. These amounts include equity-based compensation expense allocated to WES by Anadarko (see Equity incentive plan and Anadarko incentive plans within this Note 5).
[8] Represents interest expense recognized on the note payable to Anadarko (see Note 8) and, for the three months ended March 31, 2012, interest imputed on the reimbursement payable to Anadarko for certain expenditures Anadarko incurred in 2011 related to the construction of the Brasada and Lancaster plants. In the fourth quarter of 2012, WES repaid the note payable to Anadarko and the reimbursement payable to Anadarko related to the construction of the Brasada and Lancaster plants. See Note receivable from and amounts payable to Anadarko within this Note 5.
[9] Represents net income for periods including and subsequent to the acquisition of WES assets (as defined in Note 1). See Note 4.