Inventories (Schedule of Inventories) (Details) - USD ($) $ in Thousands		Sep. 30, 2021	Sep. 30, 2020
Inventory Net [Abstract]
Raw materials		$ 107,412	$ 123,626
Work in progress		95,846	92,934
Component parts	[1]	260,244	255,980
Finished goods		63,109	66,889
Customer supplied inventory		14,169	14,955
On-hand inventory for which control has transferred to the customer		(120,809)	(116,441)
Inventory, net		$ 419,971	$ 437,943

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