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Assets Held for Sale - Additional Information (Detail) $ in Thousands		3 Months Ended
	Jul. 01, 2025 Engine	Jun. 30, 2025 USD ($) Airframes Engines	Mar. 31, 2025 Engines Airframes	Sep. 30, 2024 USD ($)
Long Lived Assets Held For Sale [Line Items]
Aircraft held for sale current | $		$ 60,311		$ 5,741
Current Assets [Member]
Long Lived Assets Held For Sale [Line Items]
Aircraft held for sale current | $		$ 60,300
Airframes [Member]
Long Lived Assets Held For Sale [Line Items]
Number of aircraft held for sale | Airframes		21	27
Engines [Member]
Long Lived Assets Held For Sale [Line Items]
Number of aircraft held for sale | Engines		34	46
CRJ-900 Airframes [Member]
Long Lived Assets Held For Sale [Line Items]
Number of aircraft held for sale | Airframes		6
GE Model CF34-8C [Member]
Long Lived Assets Held For Sale [Line Items]
Number of engine sold | Engines		13
GE Model CF34-8C [Member] | Subsequent Event [Member]
Long Lived Assets Held For Sale [Line Items]
Number of engine sold | Engine	8

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Amount of assets held-for-sale that are not part of a disposal group, expected to be sold within a year or the normal operating cycle, if longer.

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-Topic 852
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-Name Accounting Standards Codification
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