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Leases, Commitments, Guarantees and Contingencies (Tables) | 9 Months Ended
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Sep. 30, 2023
Leases, Commitments, Guarantees and Contingencies |
Summary of related terms and discount rates | ​
​ | ​
​ | ​
Weighted-average remaining lease term for operating leases | 10 years
Weighted-average discount rate for operating leases | 6.1%
Summary of lease costs | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the three months ended September 30, | ​ | For the nine months ended September 30,
​ |  | 2023 |  | 2022 |  | 2023 |  | 2022
Operating lease cost | ​ | $ | 7,959 | ​ | $ | 21,697 | ​ | $ | 40,764 | ​ | $ | 65,360
Variable and short-term lease cost | ​ |  | 868 | ​ |  | 765 | ​ |  | 2,205 | ​ |  | 2,588
Sublease income | ​ | ​ | (1,350) | ​ | ​ | (1,845) | ​ | ​ | (4,051) | ​ | ​ | (5,492)
Total lease cost | ​ | $ | 7,477 | ​ | $ | 20,617 |  | $ | 38,918 | ​ | $ | 62,456
Schedule of future minimum rental payments for operating leases |
​ | ​ | ​ | ​
October 2023 through December 2023 |  | $ | 5,044
2024 | ​ |  | 19,553
2025 | ​ |  | 16,240
2026 | ​ |  | 13,511
2027 | ​ |  | 12,316
Thereafter | ​ |  | 54,367
Total future minimum operating lease payments | ​ | $ | 121,031
Summary of commitments and obligations | The following table summarizes the Company’s commitments and obligations as noted for each of the next five years and thereafter (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Total |  | Oct - Dec 2023 |  | 2024 |  | 2025 |  | 2026 |  | 2027 |  | Thereafter
Operating lease payments for aircraft and facility obligations | ​ | $ | 121,031 | ​ | $ | 5,044 | ​ | $ | 19,553 | ​ | $ | 16,240 | ​ | $ | 13,511 | ​ | $ | 12,316 | ​ | $ | 54,367
Firm aircraft and spare engine commitments |  | ​ | 676,802 | ​ | ​ | 66,170 | ​ | ​ | 143,513 | ​ | ​ | 230,709 | ​ | ​ | 236,410 | ​ | ​ | — | ​ | ​ | —
Interest commitments (1) |  | ​ | 489,412 | ​ | ​ | 29,818 | ​ | ​ | 116,197 | ​ | ​ | 96,080 | ​ | ​ | 76,496 | ​ | ​ | 54,848 | ​ | ​ | 115,973
Principal maturities on long-term debt |  | ​ | 3,102,315 | ​ | ​ | 116,693 | ​ | ​ | 444,128 | ​ | ​ | 529,014 | ​ | ​ | 507,787 | ​ | ​ | 461,378 | ​ | ​ | 1,043,315
Total commitments and obligations | ​ | $ | 4,389,560 | ​ | $ | 217,725 | ​ | $ | 723,391 | ​ | $ | 872,043 | ​ | $ | 834,204 | ​ | $ | 528,542 | ​ | $ | 1,213,655
(1) | At September 30, 2023, the Company’s long-term debt had fixed interest rates.

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- Definition Tabular disclosure of contractual obligation by timing of payment due. Includes, but is not limited to, long-term debt obligation, lease obligation, and purchase obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (S-X 210.12-04) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-3 + Details
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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-4 + Details
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