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Subsequent Events - Additional Information (Detail) shares in Thousands, $ in Thousands						3 Months Ended	9 Months Ended
	Sep. 25, 2024 USD ($) AirCraft	Sep. 23, 2024	Jul. 01, 2024 USD ($) Engine AirCraft Airframes shares	Jun. 20, 2024 USD ($) AirCraft	May 29, 2024 USD ($) AirCraft	Jun. 30, 2024 USD ($) shares	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jul. 16, 2024 USD ($)
Subsequent Event [Line Items]
Number of shares sold | shares						760
Proceeds from sale						$ 2,700
Reimbursement of transition expenses	$ 14,000
Purcahse of aircraft							$ 16,908	$ 31,619
Subsequent Event [Member] | Archer Aviation, Inc. [Member]
Subsequent Event [Line Items]
Number of shares sold | shares			1,500
Proceeds from sale			$ 6,900
Realized gain on sale of shares			1,600
Subsequent Event [Member] | UST Loan [Member]
Subsequent Event [Line Items]
Minimum collateral coverage ratio		1.55
Subsequent Event [Member] | UST Loan [Member] | Minimum [Member]
Subsequent Event [Line Items]
Minimum collateral coverage ratio		1.55
Subsequent Event [Member] | UST Loan [Member] | Maximum [Member]
Subsequent Event [Line Items]
Minimum collateral coverage ratio		1.44
Subsequent Event [Member] | United Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Minimum liquidity requirement of line of credit availability	15,000
United Capacity Purchase Agreement [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Minimum liquidity requirement of cash and cash equivalents									$ 15,000
Reimbursement of transition expenses	$ 14,000
United Capacity Purchase Agreement [Member] | Subsequent Event [Member] | CRJ-900 and E-175 Aircraft [Member]
Subsequent Event [Line Items]
Number of combined fleet | AirCraft	60
United Capacity Purchase Agreement [Member] | Subsequent Event [Member] | CRJ-700 Aircraft [Member]
Subsequent Event [Line Items]
Number of aircraft leased | AirCraft	2
Purcahse of aircraft	$ 11,000
Purchase agreement [Member]
Subsequent Event [Line Items]
Number of aircraft sold | AirCraft				14	9
Purchase agreement [Member] | UST Loan [Member]
Subsequent Event [Line Items]
Gross proceeds from sale of asset				$ 24,700	$ 8,800
Purchase agreement [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Net proceeds from sale of asset			4,400
Gross proceeds from sale of asset			$ 12,900
Number of aircraft sold | Engine			8
Purchase agreement [Member] | Subsequent Event [Member] | UST Loan [Member]
Subsequent Event [Line Items]
Net proceeds from sale of asset			$ 4,400
Gross proceeds from sale of asset			$ 12,900
Number of aircraft sold | AirCraft			8
December 13, 2023 Purchase Agreement [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Gross proceeds from sale of asset			$ 1,500
Number of aircraft sold | Engine			3
RASPRO Asset Purchase and Sale [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Number of airframes without engines | Airframes			9
Number of engines | Engine			15
Number of engine sold | Engine			14
Proceeds from sale of aircraft			$ 20,400
Gross proceeds from sale of asset	$ 23,200		$ 700

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