Detail of Selected Balance Sheet Accounts (Activity in Product Warranty Accrual) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Balance Sheet Related Disclosures [Abstract]
Balance at beginning of period	$ 4,375	$ 4,833	$ 4,557	$ 5,282
Increase to warranty expense	1,033	884	2,100	2,390
Deduction for warranty charges	(766)	(1,023)	(1,794)	(2,949)
Increase (decrease) due to foreign currency translations	81	61	(140)	32
Balance at end of period	$ 4,723	$ 4,755	$ 4,723	$ 4,755