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Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 segment | Jun. 30, 2013 | Dec. 31, 2013
Segment Reporting |  |  |  |  |
Operating segments number |  |  | 2 |  |
Number of operating subsidiaries representing operating segments |  |  | 2 |  |
Segment Reporting |  |  |  |  |
Operating revenues | $ 816,574 | $ 839,130 | $ 1,588,960 | $ 1,642,617 |
Operating expense | 803,330 | 788,575 | 1,603,490 | 1,576,499 |
Depreciation and amortization expense | 64,252 | 61,174 | 126,567 | 122,174 |
Interest expense | 16,138 | 17,526 | 31,814 | 35,491 |
Segment profit (loss) | (2,894) | 33,029 | (46,344) | 30,627 |
Identifiable intangible assets, other than goodwill | 13,873 | 16,123 | 13,873 | 16,123 | 14,998
Total assets | 4,279,841 | 4,240,070 | 4,279,841 | 4,240,070 | 4,233,219
Capital expenditures (including non-cash) | 242,360 | 33,425 | 297,508 | 63,173 |
SkyWest |  |  |  |  |
Segment Reporting |  |  |  |  |
Operating revenues | 475,501 | 463,068 | 922,543 | 912,413 |
Operating expense | 433,551 | 411,917 | 859,193 | 826,683 |
Depreciation and amortization expense | 41,958 | 38,839 | 81,958 | 77,464 |
Interest expense | 10,661 | 11,227 | 20,687 | 22,723 |
Segment profit (loss) | 31,289 | 39,924 | 42,663 | 63,007 |
Total assets | 2,688,143 | 2,656,855 | 2,688,143 | 2,656,855 |
Capital expenditures (including non-cash) | 234,986 | 21,952 | 282,842 | 44,362 |
ExpressJet |  |  |  |  |
Segment Reporting |  |  |  |  |
Operating revenues | 340,599 | 375,588 | 665,469 | 727,336 |
Operating expense | 369,891 | 374,431 | 744,317 | 746,174 |
Depreciation and amortization expense | 22,294 | 22,335 | 44,609 | 44,710 |
Interest expense | 4,743 | 5,362 | 9,618 | 10,825 |
Segment profit (loss) | (34,035) | (4,205) | (88,466) | (29,663) |
Identifiable intangible assets, other than goodwill | 13,873 | 16,123 | 13,873 | 16,123 |
Total assets | 1,591,698 | 1,583,215 | 1,591,698 | 1,583,215 |
Capital expenditures (including non-cash) | 7,374 | 11,473 | 14,666 | 19,351 |
Other |  |  |  |  |
Segment Reporting |  |  |  |  |
Operating revenues | 474 | 474 | 948 | 2,868 |
Operating expense | (112) | 2,227 | (20) | 3,642 |
Interest expense | 734 | 937 | 1,509 | 1,943 |
Segment profit (loss) | $ (148) | $ (2,690) | $ (541) | $ (2,717) |

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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References No definition available. + Details
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