Inventories (Schedule of Inventories) (Details) - USD ($) $ in Thousands		Dec. 31, 2024	Sep. 30, 2024
Inventory, Net [Abstract]
Raw materials		$ 182,598	$ 161,734
Work in progress		148,957	147,676
Component parts	[1]	392,284	376,456
Finished goods		94,772	91,787
Customer supplied inventory		17,163	20,563
On-hand inventory for which control has transferred to the customer		(203,772)	(189,124)
Inventory, net		$ 632,002	$ 609,092

[1] Component parts include items that can be sold separately as finished goods or included in the manufacture of other products.