Segment Reporting | 9 . Segment Reporting Our business is organized into three operating segments based on our service offerings: ACMI, Charter and Dry Leasing. All segments are directly or indirectly engaged in the business of air transportation services but have different commercial and economic characteristics. Each operating segment is separately reviewed by our chief operating decision maker to assess operating results and make resource allocation decisions. We do not ag gregate our operating segments and , therefore , ou r operating segments are our reportable segments. We use an economic performance metric (“Direct Contribution”) that shows the profitability of each segment after allocation of operating and ownership costs. Direct Contribution represents Income before income taxes excluding the following: Special charges, pre-operating expenses, nonrecurring items, Losses (gains) on the disposal of aircraft, Losses on early extinguishment of debt, Gains on investments, unallocated revenue and unallocated fixed costs. D irect operating and ownership costs include crew costs, maintenance, fuel, ground operations, sales costs, aircraft rent, interest expense on the portion of debt used for financing aircraft, interest income on debt securities and aircraft depreciation. Un allocated income and expenses include corporate overhead, non-aircraft depreciation, non-cash expense s and income, interest expense on the portion of debt used for general corporate purposes, interest income on non-debt se curities , capitalized interest, f oreign exchange gains and losses, other revenue and other non-operating costs. During the first quarter of 2015, we changed the methodology for allocating certain expenses to our Charter segment that were previously unallocated and we changed the allocation of certain expenses between our Charter and ACMI segments. The prior period information has been adjusted to consistently reflect these changes. The impact of the changes was as follows: For the Three Months Ended For the Nine Months Ended September 30, 2014 September 30, 2014 Prior Methodology Revised Methodology Prior Methodology Revised Methodology Direct Contribution: ACMI $54,228 $54,974 $143,554 $145,107 Charter 18,174 16,299 24,960 20,306 For the Three Months Ended For the Nine Months Ended September 30, 2015 September 30, 2014 September 30, 2015 September 30, 2014 Operating Revenue: ACMI $ 197,020 $ 184,068 $ 575,322 $ 568,929 Charter 225,068 252,855 680,642 655,462 Dry Leasing 23,915 25,411 83,235 75,611 Other 3,901 3,467 11,383 10,331 Total Operating Revenue $ 449,904 $ 465,801 $ 1,350,582 $ 1,310,333 Direct Contribution: ACMI $ 46,991 $ 54,974 $ 138,051 $ 145,107 Charter 29,496 16,299 84,974 20,306 Dry Leasing 7,673 8,721 34,092 25,630 Total Direct Contribution for Reportable Segments 84,160 79,994 257,117 191,043 Add back (subtract): Unallocated income and expenses, net (48,161) (41,010) (142,466) (116,172) Loss on early extinguishment of debt (66,729) - (66,729) - Gain on investments 13,439 - 13,439 - Special charge (7,674) (90) (7,605) (9,567) Loss on disposal of aircraft (208) - (1,531) (14,679) Income (loss) before income taxes (25,173) 38,894 52,225 50,625 Add back (subtract): Interest income (2,040) (4,588) (10,953) (14,034) Interest expense 22,110 25,960 71,691 78,777 Capitalized interest (556) (44) (759) (423) Loss on early extinguishment of debt 66,729 - 66,729 - Gain on investments (13,439) - (13,439) - Other expense (income), net 1,364 767 1,755 831 Operating Income $ 48,995 $ 60,989 $ 167,249 $ 115,776 We are exposed to a concentration of Charter revenue from the U.S. Military Air Mobility Command (the “AMC”) and Polar (see Note 3 for further discussion regarding Polar) . No other customer accounted for more than 10.0% of our Total Operating Revenue. Revenue from the AMC was $ 122.5 million for the three months ended September 30, 2015 and $ 109.8 million for the three months ended September 30, 2014 . Revenue from the AMC was $ 326.6 million for the nine months ended September 30, 2015 and $ 263.9 million for the nine months ended September 30, 2014 . Accounts receivable from the AMC were $ 23.2 million and $ 15.3 million as of September 30, 2015 and December 31, 2014 , respectively. We have not exp erienced any credit issues with either of these customers. |