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v3.20.4

Segment Reporting (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 USD ($) | Sep. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2020 USD ($) segment | Dec. 31, 2019 USD ($) segment | Dec. 31, 2018 USD ($)
Segment Reporting |  |  |  |  |  |  |  |  |  |  |
Number of operating segments | segment |  |  |  |  |  |  |  |  |  | 3 |
Number of reporting segments | segment |  |  |  |  |  |  |  |  | 2 |  |
Operating revenues | $ 589,638 | $ 457,493 | $ 350,039 | $ 729,936 | $ 743,591 | $ 760,295 | $ 744,383 | $ 723,694 | $ 2,127,106 | $ 2,971,963 | $ 3,221,679
Operating expense |  |  |  |  |  |  |  |  | 2,018,304 | 2,459,705 | 2,747,399
Depreciation and amortization expense |  |  |  |  |  |  |  |  | 474,959 | 368,098 | 334,589
Special items |  |  |  |  |  |  |  | $ 21,900 |  | 21,869 |
Interest expense |  |  |  |  |  |  |  |  | 123,173 | 127,755 | 120,409
Segment profit (loss) |  |  |  |  |  |  |  |  | (14,371) | 384,503 | 353,871
Total assets | 6,887,622 |  |  |  | 6,657,129 |  |  |  | 6,887,622 | 6,657,129 | 6,313,212
Capital expenditures (including non-cash) |  |  |  |  |  |  |  |  | 460,483 | 846,470 | 1,156,276
SkyWest Airlines |  |  |  |  |  |  |  |  |  |  |
Segment Reporting |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | 1,636,762 | 2,478,681 | 2,346,251
Operating expense |  |  |  |  |  |  |  |  | 1,716,808 | 2,214,632 | 2,022,560
Depreciation and amortization expense |  |  |  |  |  |  |  |  | 221,216 | 168,246 | 155,511
Special items |  |  |  |  |  |  |  |  |  | 18,508 |
Interest expense |  |  |  |  |  |  |  |  | 12,381 | 13,525 | 17,021
Segment profit (loss) |  |  |  |  |  |  |  |  | (92,427) | 250,524 | 306,670
Total assets | 2,804,259 |  |  |  | 2,728,964 |  |  |  | 2,804,259 | 2,728,964 | 2,531,707
Capital expenditures (including non-cash) |  |  |  |  |  |  |  |  | 124,825 | 270,191 | 149,731
ExpressJet Airlines Inc |  |  |  |  |  |  |  |  |  |  |
Segment Reporting |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  |  | 24,050 | 564,202
Operating expense |  |  |  |  |  |  |  |  |  | 28,690 | 577,608
Depreciation and amortization expense |  |  |  |  |  |  |  |  |  | 971 | 37,290
Special items |  |  |  |  |  |  |  |  |  | 3,361 |
Interest expense |  |  |  |  |  |  |  |  |  |  | 2,340
Segment profit (loss) |  |  |  |  |  |  |  |  |  | (4,640) | (15,746)
Total assets |  |  |  |  |  |  |  |  |  |  | 279,303
Capital expenditures (including non-cash) |  |  |  |  |  |  |  |  |  |  | 10,137
SkyWest Leasing |  |  |  |  |  |  |  |  |  |  |
Segment Reporting |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | 490,344 | 469,232 | 311,226
Operating expense |  |  |  |  |  |  |  |  | 301,496 | 216,383 | 147,231
Depreciation and amortization expense |  |  |  |  |  |  |  |  | 253,743 | 198,881 | 141,788
Interest expense |  |  |  |  |  |  |  |  | 110,792 | 114,230 | 101,048
Segment profit (loss) |  |  |  |  |  |  |  |  | 78,056 | 138,619 | 62,947
Total assets | $ 4,083,363 |  |  |  | $ 3,928,165 |  |  |  | 4,083,363 | 3,928,165 | 3,502,202
Capital expenditures (including non-cash) |  |  |  |  |  |  |  |  | $ 335,658 | $ 576,279 | $ 996,408

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