The following tables set forth our segment information for the periods indicated (in thousands): Year Ended December 31, 2013 Gathering and Processing Transmission Terminals (a) Total Total revenue $ 192,446 $ 90,377 $ 9,831 $ 292,654 Less: COMA Income 689 154   843 Unrealized loss on commodity derivatives (1,041 )     (1,041 ) Purchases of natural gas, NGL's and condensate 156,334 57,815   214,149 Direct operating expenses     2,080 2,080 Segment gross margin (a) 36,464 32,408 7,751 76,623 Direct operating expenses (14,214 ) (13,259 )   (27,473 ) COMA Income 843 Unrealized loss on commodity derivatives (1,041 ) Selling, general and administrative expenses (21,402 ) Equity compensation expense (2,094 ) Depreciation, amortization and accretion expense (29,999 ) Gain on involuntary conversion of property, plant and equipment 343 Loss on impairment of property, plant and equipment (18,155 ) Interest expense (9,291 ) Income tax benefit 495 Loss from operations of disposal groups, net of tax (2,255 ) Net loss (33,406 ) Less: Net income attributable to non-controlling interests 633 Net loss attributable to the Partnership $ (34,039 ) (a) Terminals segment amounts are for the period from April 15, 2013 to December 31, 2013. Year Ended December 31, 2012 Gathering and Processing Transmission Total Total revenue $ 145,714 $ 52,529 $ 198,243 Less: COMA Income 673 2,700 3,373 Unrealized gain on commodity derivatives 992   992 Purchases of natural gas, NGL's and condensate 108,656 36,516 145,172 Segment gross margin (a) 35,393 13,313 48,706 Direct operating expenses (11,767 ) (5,031 ) (16,798 ) COMA Income 3,373 Unrealized gain on commodity derivatives 992 Selling, general and administrative expenses (14,309 ) Equity compensation expense (1,783 ) Depreciation, amortization and accretion expense (21,284 ) Loss on involuntary conversion of property, plant and equipment (1,021 ) Gain on sale of assets, net 123 Interest expense (4,570 ) Income from operations of disposal groups 319 Net loss (6,252 ) Less: Net income attributable