Year Ended December 31, | |||||||||||
2013 | 2012 | 2011 | |||||||||
(in thousands) | |||||||||||
Other income | $ | 8,282 | $ | 5,382 | $ | 9,125 | |||||
Equity interest in income of EFS Midstream | 7,266 | 2,183 | 1,925 | ||||||||
Deferred compensation plan income | 5,954 | 1,872 | 1,657 | ||||||||
Interest income | 321 | 1,465 | 697 | ||||||||
Income (loss) from vertical integration services (a) | (4,862 | ) | (11,934 | ) | 15,978 | ||||||
Total interest and other income | $ | 16,961 | $ | (1,032 | ) | $ | 29,382 | ||||
(a) | Income (loss) from vertical integration services represent net margins that result from Company-provided fracture stimulation, drilling and related service operations, which are ancillary to and supportive of the Company's oil and gas joint operating activities, and do not represent intercompany transactions. For the three years ended December 31, 2013, 2012 and 2011, these net margins include $284.9 million, $247.8 million and $50.9 million of gross vertical integration revenues, respectively and $289.8 million, $259.7 million and $34.9 million of total vertical integration costs and expenses, respectively. |