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Assets Held for Sale - Additional Information (Detail) $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2024 USD ($) Engine Airframes | Mar. 31, 2024 Engine Airframes | Jun. 30, 2024 USD ($) Airframes Engine | Sep. 30, 2023 USD ($)
Long Lived Assets Held For Sale [Line Items] |  |  |  |
Assets held for sale | $ 57,229 |  | $ 57,229 | $ 12,000
Number of engines held to sale | Engine | 13 | 66 | 64 |
Current Assets [Member] |  |  |  |
Long Lived Assets Held For Sale [Line Items] |  |  |  |
Assets held for sale | $ 20,200 |  | $ 20,200 |
Noncurrent Assets [Member] |  |  |  |
Long Lived Assets Held For Sale [Line Items] |  |  |  |
Assets held for sale | $ 57,200 |  | 57,200 |
CRJ-900 Aircraft [Member] |  |  |  |
Long Lived Assets Held For Sale [Line Items] |  |  |  |
Number of engine sold | Engine | 15 |  |  |
Assets held for sale | $ 77,400 |  | $ 77,400 |
Number of airframes without engines | Airframes |  | 26 | 20 |
Number of airframes sold | Airframes | 6 |  |  |

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- Definition Amount of assets held-for-sale that are not part of a disposal group. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 15 -Paragraph 4 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482309/360-10-15-4 + Details
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