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Nature of Operations and Summary of Significant Accounting Policies - Flying Agreements (Details) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Jan. 01, 2020 USD ($) | Jun. 30, 2023 aircraft | Dec. 31, 2021 USD ($) aircraft | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2023 aircraft
Agreements with other airlines |  |  |  |  |  |
Percentage of ASMs flown under fixed-fee arrangements |  |  | 84.30% | 87.00% |  |
Percentage of ASMs flown under pro-rate arrangements |  |  | 15.70% | 13.00% |  |
Rental income under operating leases |  |  |  |  |  |
Operating lease revenue relating to lease payments |  |  | $ 46,532 | $ 34,791 | $ 27,552 |
Operating lease revenue relating to variable lease payments |  |  | 19,998 | 5,710 | 9,608 |
Total operating revenues |  |  | 2,713,491 | 2,127,106 | 2,971,963 |
Future minimum rental income |  |  |  |  |  |
2022 |  |  | 45,777 |  |  |
2023 |  |  | 45,008 |  |  |
2024 |  |  | 42,593 |  |  |
2025 |  |  | 39,145 |  |  |
2026 |  |  | 34,516 |  |  |
Thereafter |  |  | 120,636 |  |  |
Total |  |  | 327,675 |  |  |
Deferred revenue recognized |  |  | 6,800 |  |  |
Unbilled revenue |  |  | 8,404 |  |  |
Deferred revenue |  |  | 103,900 | 110,700 |  |
Deferred revenue in other current liabilities |  |  | 24,500 |  |  |
Deferred revenue in other long-term liabilities |  |  | 79,400 |  |  |
Property and equipment and related assets |  |  | 5,498,599 | 5,362,048 |  |
Deferred recognizing revenue |  |  | (6,832) | 110,728 |  |
Accounts receivable |  |  | 65,300 | 34,500 |  |
Gross receivables current |  |  | 86,200 |  |  |
Gross receivables Non-current |  |  | 230,700 |  |  |
Balance | $ 15,388 |  | 46,225 | 15,388 |  |
Adjustments to credit loss reserves |  |  | (4,249) | 30,837 |  |
Balance |  |  | $ 41,976 | 46,225 | 15,388 |
Topic 326 |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Credit loss | $ 11,600 |  |  |  |  |
United | United Express Agreements [Member] |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Agreement term |  |  | 4 years 2 months 12 days |  |  |
United | United Express Prorate Agreement [Member] |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Notice period for termination of agreement |  |  | 120 days |  |  |
Delta |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Number of aircraft | aircraft |  |  | 149 |  |  |
Delta | Delta Connection Prorate Agreement |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Notice period for termination of agreement |  |  | 30 days |  |  |
Delta | Delta Connection Agreements [Member] |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Agreement term |  |  | 5 years 6 months |  |  |
American |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Number of aircraft | aircraft |  |  | 108 |  |  |
American | American Capacity Purchase Agreement [Member] |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Agreement term |  |  | 4 years 9 months 18 days |  |  |
Alaska | Alaska Capacity Purchase Agreement [Member] |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Agreement term |  |  | 8 years 7 months 6 days |  |  |
Jet aircraft and spare engines leased to third parties |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Property and equipment and related assets |  |  | $ 252,600 |  |  |
CRJ 200 [Member] |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Number of seats on aircraft | aircraft |  |  | 50 |  |  |
CRJ 200 [Member] | United | United Express Agreements [Member] |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Number of aircraft | aircraft |  |  | 70 |  |  |
CRJ 200 [Member] | Delta | Delta Connection Prorate Agreement |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Number of aircraft | aircraft |  |  | 29 |  |  |
CRJ 700 [Member] | Minimum [Member] |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Number of seats on aircraft | aircraft |  |  | 65 |  |  |
CRJ 700 [Member] | Maximum [Member] |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Number of seats on aircraft | aircraft |  |  | 76 |  |  |
CRJ 700 [Member] | United | United Express Agreements [Member] |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Number of aircraft | aircraft |  |  | 19 |  |  |
CRJ 700 [Member] | Delta | Delta Capacity Purchase Agreement |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Number of aircraft | aircraft |  |  | 5 |  |  |
CRJ 700 [Member] | American |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Number of aircraft under purchase agreement | aircraft |  |  | 11 |  |  |
CRJ 700 [Member] | American | American Capacity Purchase Agreement [Member] |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Number of aircraft | aircraft |  |  | 90 |  |  |
CRJ 900 | Minimum [Member] |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Number of seats on aircraft | aircraft |  |  | 65 |  |  |
CRJ 900 | Maximum [Member] |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Number of seats on aircraft | aircraft |  |  | 76 |  |  |
CRJ 900 | Sky West Airlines Inc [Member] | Forecast |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Number of aircraft to be placed by 2022 | aircraft |  | 16 |  |  |  |
Number of aircraft replaced | aircraft |  |  |  |  |  | 16
Number of aircraft to be replaced | aircraft |  | 16 |  |  |  |
CRJ 900 | Delta | Delta Capacity Purchase Agreement |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Number of aircraft | aircraft |  |  | 44 |  |  |
E175 [Member] | Minimum [Member] |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Number of seats on aircraft | aircraft |  |  | 65 |  |  |
E175 [Member] | Maximum [Member] |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Number of seats on aircraft | aircraft |  |  | 76 |  |  |
E175 [Member] | Sky West Airlines Inc [Member] | Delta Capacity Purchase Agreement |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Number of aircraft under purchase agreement | aircraft |  |  | 16 |  |  |
Number of aircraft to be placed by 2022 | aircraft |  |  | 16 |  |  |
Number aircraft right to repurchase | aircraft |  |  | 16 |  |  |
E175 [Member] | Sky West Airlines Inc [Member] | Alaska Capacity Purchase Agreement [Member] |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Number of aircraft under purchase agreement | aircraft |  |  | 11 |  |  |
E175 [Member] | United | United Express Agreements [Member] |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Number of aircraft | aircraft |  |  | 90 |  |  |
E175 [Member] | Delta | Delta Capacity Purchase Agreement |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Number of aircraft | aircraft |  |  | 71 |  |  |
E175 [Member] | American |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Number of aircraft | aircraft |  |  | 2 |  |  |
E175 [Member] | American | American Capacity Purchase Agreement [Member] |  |  |  |  |  |
Future minimum rental income |  |  |  |  |  |
Number of aircraft | aircraft |  |  | 18 |  |  |
Flying agreements |  |  |  |  |  |
Rental income under operating leases |  |  |  |  |  |
Total operating revenues |  |  | $ 2,615,076 | 2,060,801 | 2,889,265 |
Future minimum rental income |  |  |  |  |  |
Accounts receivable |  |  | 50,800 | 27,500 |  |
Flight operations |  |  |  |  |  |
Rental income under operating leases |  |  |  |  |  |
Total operating revenues |  |  | 1,146,375 | 945,008 | 1,538,062 |
Aircraft lease and fixed revenue |  |  |  |  |  |
Rental income under operating leases |  |  |  |  |  |
Total operating revenues |  |  | 1,059,017 | 846,933 | 830,247 |
Prorate agreements |  |  |  |  |  |
Rental income under operating leases |  |  |  |  |  |
Total operating revenues |  |  | 409,684 | 268,860 | 520,956 |
Airport customer service and other revenue |  |  |  |  |  |
Rental income under operating leases |  |  |  |  |  |
Total operating revenues |  |  | 31,885 | 25,804 | 45,538 |
Lease, airport services and other. |  |  |  |  |  |
Rental income under operating leases |  |  |  |  |  |
Total operating revenues |  |  | $ 98,415 | $ 66,305 | $ 82,698 |

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