Inventories (Schedule of Inventories) (Details) - USD ($) $ in Thousands		Mar. 31, 2023	Sep. 30, 2022
Inventory Net [Abstract]
Raw materials		$ 146,695	$ 126,264
Work in progress		130,962	123,005
Component parts	[1]	343,456	329,962
Finished goods		89,392	70,019
Customer supplied inventory		14,779	12,442
On-hand inventory for which control has transferred to the customer		(157,500)	(147,405)
Inventory, net		$ 567,784	$ 514,287

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