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Leases, Commitments, Guarantees and Contingencies (Tables) | 3 Months Ended
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Mar. 31, 2025
Leases, Commitments, Guarantees and Contingencies |
Summary of related terms and discount rates | ​
​ | ​
​ | ​
Weighted-average remaining lease term for operating leases | 11.0 years
Weighted-average discount rate for operating leases | 6.2%
Summary of lease costs | ​
​ | ​
​ | ​
Weighted-average remaining lease term for operating leases | 11.0 years
Weighted-average discount rate for operating leases | 6.2%
​ The Company’s lease costs for the three months ended March 31, 2025 and 2024 included the following components (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the three months ended March 31,
​ |  | 2025 |  | 2024
Operating lease cost | ​ | $ | 8,250 | ​ | $ | 7,259
Variable and short-term lease cost | ​ |  | 489 | ​ |  | 1,033
Sublease income | ​ | ​ | (1,115) | ​ | ​ | (1,246)
Total lease cost | ​ | $ | 7,624 | ​ | $ | 7,046
Schedule of future minimum rental income under operating leases | The following table summarizes future minimum rental payments required under operating leases that had initial or remaining non-cancelable lease terms as of March 31, 2025 (in thousands): ​
​ | ​ | ​ | ​
April 2025 through December 2025 |  | $ | 15,897
2026 | ​ |  | 18,463
2027 | ​ |  | 15,871
2028 | ​ |  | 11,165
2029 | ​ |  | 9,461
Thereafter | ​ |  | 53,083
Total | ​ | $ | 123,940
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 |  | Apr - Dec 2025 |  | 2026 |  | 2027 |  | 2028 |  | 2029 |  | Thereafter
Operating lease payments for aircraft and facility obligations | ​ | $ | 123,940 | ​ | $ | 15,897 | ​ | $ | 18,463 | ​ | $ | 15,871 | ​ | $ | 11,165 | ​ | $ | 9,461 | ​ | $ | 53,083
Firm aircraft and spare engine commitments |  | ​ | 489,499 | ​ | ​ | 260,330 | ​ | ​ | 229,169 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Interest commitments (1) |  | ​ | 387,111 | ​ | ​ | 76,599 | ​ | ​ | 86,937 | ​ | ​ | 63,831 | ​ | ​ | 47,172 | ​ | ​ | 35,026 | ​ | ​ | 77,546
Principal maturities on long-term debt |  | ​ | 2,578,587 | ​ | ​ | 376,557 | ​ | ​ | 532,131 | ​ | ​ | 487,090 | ​ | ​ | 316,979 | ​ | ​ | 213,257 | ​ | ​ | 652,573
Total commitments and obligations | ​ | $ | 3,579,137 | ​ | $ | 729,383 | ​ | $ | 866,700 | ​ | $ | 566,792 | ​ | $ | 375,316 | ​ | $ | 257,744 | ​ | $ | 783,202
(1) | At March 31, 2025, 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 -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 04 -Subparagraph (a) -Publisher SEC Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -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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