Inventories - Inventories (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Mar. 31, 2021
Corporate and other:
Commercial jet engines and parts	$ 61,583	$ 60,516
Total inventories	78,334	74,073
Reserves	(1,888)	(2,102)
Total inventories, net of reserves	76,446	71,971
Overnight air cargo
Ground equipment manufacturing:
Finished goods	30	0
Corporate and other:
Finished goods	30	0
Ground equipment manufacturing:
Ground equipment manufacturing:
Raw materials	4,509	4,695
Work in process	2,120	5,820
Finished goods	8,714	1,691
Corporate and other:
Raw materials	4,509	4,695
Finished goods	8,714	1,691
Corporate and other
Ground equipment manufacturing:
Raw materials	650	462
Finished goods	728	889
Corporate and other:
Raw materials	650	462
Finished goods	$ 728	$ 889