STATEMENTS OF SUPPLEMENTAL CONSOLIDATED AND COMBINED EQUITY (USD $)
In Thousands
Total
Limited Partners Common Units [Member]
Limited Partners Subordinated [Member]
General Partner [Member]
Previous Owners [Member]
NGP IDR [Member]
Noncontrolling Interest [Member]
Balance at Dec. 31, 2011 $ 891,483 $ 241,034 $ 61,708 $ 426 $ 583,158   $ 5,157
Net income (loss) 23,067 114 7   22,842   104
Net proceeds from the issuance of common units 194,134 194,134          
Contributions 64,803     206 64,597    
Contribution of oil and gas properties 6,893       6,893    
Distribution attributable to net assets acquired (260,663) (209,720) (77,701) (242) 27,000    
Net book value of net assets acquired (Note 12)   99,972 44,269 94 (144,335)    
Contribution related to sale of assets to NGP affiliate 40,138       40,138    
Net book value of net assets acquired by NGP affiliate (33,859)       (33,859)    
Amortization of equity awards 1,423 1,423          
Distributions (62,922) (26,152) (8,298) (34) (28,438)    
Deferred tax liability adjustments 446 335 111        
Other (80) 64 60   (204)    
Balance at Dec. 31, 2012 864,863 301,204 20,156 450 537,792   5,261
Net income (loss) 61,005 7,880 797 49 52,012   267
Net proceeds from the issuance of common units 490,138 490,138          
Contributions 97,324     521 96,803    
Distribution attributable to net assets acquired (502,920) (490,400) (67,242) (559) 55,281    
Net book value of net assets acquired (Note 12)   355,159 48,739 403 (404,301)    
Amortization of equity awards 3,558 3,558          
Distributions (127,741) (85,342) (11,165) (136) (31,098)    
Other (2,424) (122)     (2,302)    
Net assets retained by previous owners (20,782)       (20,782)    
Balance at Dec. 31, 2013 863,021 582,075 (8,715) 728 283,405   5,528
Net income (loss) 115,614 113,573 4,180 206 (2,465) 88 32
Net proceeds from the issuance of common units 540,698 540,698          
Contributions 6,560     570 5,990    
Distribution attributable to net assets acquired (2,413) (2,321) (90) (2)      
Distribution of net asset to MRD Holdco (26,131)       (26,131)    
Amortization of equity awards 7,874 7,874          
Tax related effects attributable to Memorial Resource restructuring and initial public offering (30,483)       (30,483)    
Distributions (164,738) (142,719) (11,794) (251) (9,886) (88)  
Common units repurchased under repurchase program (Note 9) (12,903) (12,903)          
Restricted units repurchased (See Note 9) (1,012) (1,012)          
Other 227       227    
Balance at Dec. 31, 2014 $ 1,296,314 $ 1,085,265 $ (16,419) $ 1,251 $ 220,657   $ 5,560