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Flight equipment subject to operating lease - Narrative (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended | 7 Months Ended | 12 Months Ended | 43 Months Ended
--- | --- | --- | --- | --- | --- | ---
Aug. 04, 2025 USD ($) | Dec. 31, 2023 USD ($) aircraft | Oct. 31, 2022 USD ($) aircraft | Jun. 30, 2025 USD ($) | Mar. 31, 2025 USD ($) | Mar. 31, 2022 USD ($) | Jun. 30, 2025 USD ($) agreement | Jun. 30, 2024 USD ($) | Aug. 04, 2025 USD ($) | Dec. 31, 2022 USD ($) | Aug. 04, 2025 USD ($)
Property, Plant, and Equipment, Lessor Asset under Operating Lease [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of agreements not entered into | agreement |  |  |  |  |  |  | 1 |  |  |  |
Proceeds from settlement of insurance claims |  |  |  |  |  |  | $ 611,728 | $ 0 |  |  |
S7 |  |  |  |  |  |  |  |  |  |  |
Property, Plant, and Equipment, Lessor Asset under Operating Lease [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of aircrafts subject to insurance policies | aircraft |  | 4 |  |  |  |  |  |  |  |  |
Flight Equipment |  |  |  |  |  |  |  |  |  |  |
Property, Plant, and Equipment, Lessor Asset under Operating Lease [Line Items] |  |  |  |  |  |  |  |  |  |  |
Write-off of aircrafts |  |  |  |  |  |  |  |  |  | $ 760,100 |
Proceeds from settlement of insurance claims |  |  |  | $ 339,400 | $ 328,500 |  |  |  |  |  |
Write-off of its interests |  |  |  |  |  | $ 791,000 |  |  |  |  |
Benefit recorded related to return of aircraft from Russia |  |  | $ 30,900 |  |  |  |  |  |  |  |
Number of aircrafts returned from Russia | aircraft |  |  | 1 |  |  |  |  |  |  |  |
Flight Equipment | S7 |  |  |  |  |  |  |  |  |  |  |
Property, Plant, and Equipment, Lessor Asset under Operating Lease [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from settlement of insurance claims |  | $ 64,700 |  |  |  |  |  |  |  |  |
Flight Equipment | Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Property, Plant, and Equipment, Lessor Asset under Operating Lease [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from settlement of insurance claims |  |  |  |  |  |  |  |  |  |  | $ 822,400
Flight Equipment | Subsequent Event | C&P Insurers |  |  |  |  |  |  |  |  |  |  |
Property, Plant, and Equipment, Lessor Asset under Operating Lease [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from settlement of insurance claims | $ 58,800 |  |  |  |  |  |  |  | $ 726,800 |  |

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