Inventories (Schedule of Inventories) (Details) - USD ($) $ in Thousands		Jun. 30, 2023	Sep. 30, 2022
Inventory Net [Abstract]
Raw materials		$ 145,513	$ 126,264
Work in progress		129,080	123,005
Component parts	[1]	337,004	329,962
Finished goods		80,194	70,019
Customer supplied inventory		12,841	12,442
On-hand inventory for which control has transferred to the customer		(172,798)	(147,405)
Inventory, net		$ 531,834	$ 514,287

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