Inventories (Schedule of Inventories) (Details) - USD ($) $ in Thousands		Mar. 31, 2024	Sep. 30, 2023
Inventory, Net [Abstract]
Raw materials		$ 159,355	$ 133,699
Work in progress		140,322	127,438
Component parts	[1]	352,269	327,522
Finished goods		88,978	74,594
Customer supplied inventory		17,941	14,543
On-hand inventory for which control has transferred to the customer		(178,488)	(159,953)
Inventory, net		$ 580,377	$ 517,843

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