Debt - Additional information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022	Jul. 31, 2003
Operating lease right of use asset	$ 11,113		$ 11,113		$ 13,480
Gain on extinguishment of debt	70	$ 0	70	$ 0
Hangar [Member]
Operating lease right of use asset	$ 2,431		2,431		$ 2,547
City of Milwaukee, Wisconsin variable rate Industrial Development Bonds [Member]
Aggregate principal amount						$ 4,275
Aircraft Notes Due December 31, 2025 [Member]
Gain on extinguishment of debt			70
Extinguishment of debt principal amount			$ 3,500