CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Revenues:      
Gathering services and other fees $ 174,506 $ 149,371 $ 91,421
Natural gas, NGLs and condensate sales and other 69,332 16,320 12,439
Amortization of favorable and unfavorable contracts (1,032) (192) (308)
Total revenues 242,806 165,499 103,552
Costs and expenses:      
Operation and maintenance 59,972 51,658 29,855
Cost of natural gas and NGLs 31,036 0 0
General and administrative 24,558 21,357 17,476
Transaction costs 2,770 2,020 3,166
Depreciation and amortization 60,824 35,299 11,367
Total costs and expenses 179,160 110,334 61,864
Other (expense) income (108) 9 12
Interest expense (19,173) (7,340) (1,029)
Affiliated interest expense 0 (5,426) (2,025)
Income before income taxes 44,365 42,408 38,646
Income tax expense (729) (682) (695)
Net income 43,636 41,726 37,951
Less: net income attributable to the pre-IPO period 0 24,112  
Less: net income attributable to SMP Holdings (Note 1) 52 0  
Net income attributable to SMLP 43,584 17,614  
Less: net income attributable to general partner, including IDRs 1,035 352  
Net income attributable to limited partners $ 42,549 $ 17,262  
Earnings per common unit – basic (in dollars per unit) $ 0.86 $ 0.35  
Earnings per common unit – diluted (in dollars per unit) $ 0.86 $ 0.35  
Earnings per subordinated unit – basic and diluted (in dollars per unit) $ 0.79 $ 0.35  
Weighted-average common units outstanding – basic (in units) 26,951,346 24,412,427  
Weighted-average common units outstanding – diluted (in units) 27,101,479 24,543,985  
Weighted-average subordinated units outstanding – basic and diluted (in units) 24,409,850 24,409,850