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Assets Held for Sale - Additional Information (Detail) $ in Thousands |  | 6 Months Ended |
--- | --- | --- | ---
Jan. 31, 2023 USD ($) AirCraft | Mar. 31, 2023 USD ($) AirCraft | Mar. 31, 2022 USD ($) | Sep. 30, 2022 USD ($)
Long Lived Assets Held For Sale [Line Items] |  |  |  |
Asset impairment |  | $ 20,462 | $ 39,475 |
Assets held for sale |  | 21,000 |  | $ 73,000
Proceeds from sale of property |  | 28,600 |  |
Proceeds from sale of aircraft and engines |  | $ 86,104 |  |
CRJ-900 [Member] |  |  |  |
Long Lived Assets Held For Sale [Line Items] |  |  |  |
Number of aircraft held for sale | AirCraft |  | 14 |  |
Number of aircraft sold | AirCraft |  | 4 |  |
Proceeds from sale of aircraft and engines |  | $ 12,000 |  |
CRJ 700 [Member] |  |  |  |
Long Lived Assets Held For Sale [Line Items] |  |  |  |
Number of aircraft sold | AirCraft | 8 |  |  |
Proceeds from sale of property | $ 8,000 |  |  |
CRJ-200 Aircraft [Member] |  |  |  |
Long Lived Assets Held For Sale [Line Items] |  |  |  |
Number of aircraft held for sale | AirCraft |  | 1 |  |
CRJ900 CRJ200 Aircraft [Member] |  |  |  |
Long Lived Assets Held For Sale [Line Items] |  |  |  |
Assets held for sale |  | $ 40,500 |  |

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=126905981&loc=d3e2420-110228 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The cash inflow from the sale of formerly productive land held for sale, anything permanently fixed to it, including buildings, structures on it, and so forth. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3179-108585 + Details
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