Inventories (Schedule of Inventory, Current by major category) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Sep. 30, 2012
Inventory Disclosure [Abstract]
Purchased components	$ 12,669	$ 17,059
Work-in-process	17,369	28,921
Finished goods	34,568	20,984
Inventories	$ 64,606	$ 66,964	[1]

[1] Derived from audited financial statements.