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Balance Sheet Information - Additional Information (Detail) $ in Thousands			1 Months Ended		3 Months Ended		12 Months Ended
	Jan. 01, 2024 USD ($)	Dec. 01, 2023 Engine	Sep. 30, 2021 USD ($) shares	Jul. 31, 2021 USD ($)	Dec. 31, 2023 USD ($) Airframes Engine	Dec. 31, 2022 USD ($)	Sep. 30, 2023 USD ($) AirCraft	Feb. 28, 2022 USD ($)	Feb. 28, 2021 USD ($)
Condensed Balance Sheet Statements Captions [Line Items]
Number of surplus engines to be sold | Engine		12
Depreciation expense					$ 13,300	$ 14,400
Estimated initial equity warrant asset value									$ 16,400
Investments in equity securities					23,021		$ 20,320
Estimated initial warrant asset value								$ 3,200
Net gain/(loss) on investments in equity securities					2,500	(1,700)
Aggregate carrying amount of investments in equity securities					23,000		20,300
Investments without readily determinable fair value					8,800		$ 8,800
Asset impairment					40,384	$ 3,719
Subsequent Event [Member] | United Capacity Purchase Agreement [Member]
Condensed Balance Sheet Statements Captions [Line Items]
Realized and unrealized gain on investment	$ 7,200
Archer Aviation, Inc. [Member] | Level 1 [Member]
Condensed Balance Sheet Statements Captions [Line Items]
Realized and unrealized gain on investment					2,500
Investments in equity securities					$ 13,900
Heart Aerospace Incorporated [Member] | Forward Purchase Contract [Member] | Preferred Stock [Member]
Condensed Balance Sheet Statements Captions [Line Items]
Purchase of preferred stock				$ 5,000
Initial investment in preferred stock measured at cost				$ 5,000
Class A [Member] | Archer Aviation, Inc. [Member]
Condensed Balance Sheet Statements Captions [Line Items]
Stock issued during period, Shares | shares			500,000
Stock issued during period, Value			$ 5,000
Total grant date value, Additional warrant to purchase shares			$ 5,600
CRJ-900 [Member]
Condensed Balance Sheet Statements Captions [Line Items]
Number of aircraft held for sale | AirCraft							8
Number of Airframes without Engines | Airframes					11
CRJ-900 [Member] | RASPRO and Export Development Canada Aircraft Lease Agreement [Member]
Condensed Balance Sheet Statements Captions [Line Items]
Impairment loss related to the held for sale aircraft					$ 40,400
CF34-8C Aircraft [Member]
Condensed Balance Sheet Statements Captions [Line Items]
Number of surplus engines to be sold | Engine					48

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