Inventories (Schedule of Inventories) (Details) - USD ($) $ in Thousands		Dec. 31, 2023	Sep. 30, 2023
Inventory, Net [Abstract]
Raw materials		$ 154,663	$ 133,699
Work in progress		133,977	127,438
Component parts	[1]	343,444	327,522
Finished goods		88,614	74,594
Customer supplied inventory		14,357	14,543
On-hand inventory for which control has transferred to the customer		(175,382)	(159,953)
Inventory, net		$ 559,673	$ 517,843

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