Inventories - Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Mar. 31, 2023
Commercial jet engines and parts:
Whole engines available for sale or tear-down	$ 0	$ 10,141
Parts	44,527	50,813
Total inventories	58,095	74,738
Reserves	(3,639)	(3,613)
Total inventories, net of reserves	54,456	71,125
Overnight air cargo:
Ground equipment manufacturing:
Finished goods	703	546
Corporate and other:
Finished goods	703	546
Ground equipment manufacturing:
Ground equipment manufacturing:
Raw materials	5,885	4,589
Work in process	1,697	153
Finished goods	3,641	6,976
Corporate and other:
Raw materials	5,885	4,589
Finished goods	3,641	6,976
Corporate and other
Ground equipment manufacturing:
Raw materials	917	794
Finished goods	725	726
Corporate and other:
Raw materials	917	794
Finished goods	$ 725	$ 726