Inventories (Schedule of Inventories) (Details) - USD ($) $ in Thousands		Dec. 31, 2021	Sep. 30, 2021
Inventory Net [Abstract]
Raw materials		$ 120,633	$ 107,412
Work in progress		105,488	95,846
Component parts	[1]	274,955	260,244
Finished goods		74,060	63,109
Customer supplied inventory		15,771	14,169
On-hand inventory for which control has transferred to the customer		(139,073)	(120,809)
Inventory, net		$ 451,834	$ 419,971

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