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Nature of Operations and Summary of Significant Accounting Policies - Long-Lived Assets (Details) $ in Thousands | 12 Months Ended
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Jun. 30, 2023 aircraft | Dec. 31, 2021 USD ($) aircraft | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Impairment of Long Lived and Intangible Assets |  |  |  |
Property and equipment and related assets | $ |  | $ 5,498,599 | $ 5,362,048 |
Impairment of long-lived assets | $ |  |  | $ 0 | $ 0
CRJ 900 |  |  |  |
Impairment of Long Lived and Intangible Assets |  |  |  |
Impairment charges | $ |  | $ 84,592 |  |
Forecast | Sky West Airlines Inc [Member] | CRJ 900 |  |  |  |
Impairment of Long Lived and Intangible Assets |  |  |  |
Number of aircraft to be placed by 2022 | 16 |  |  |
Number of aircraft to be replaced | 16 |  |  |
Delta Capacity Purchase Agreement | Sky West Airlines Inc [Member] | E175 [Member] |  |  |  |
Impairment of Long Lived and Intangible Assets |  |  |  |
Number of aircraft to be placed by 2022 |  | 16 |  |
Number of aircraft under purchase agreement |  | 16 |  |

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