Inventories (Activity in Reserves for Excess and Obsolete Inventory) (Details) - SEC Schedule, 12-09, Reserve, Inventory [Member] - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation allowance beginning of period	$ (9,313)	$ (10,599)	$ (10,141)
Additions charged to expense	(5,754)	(419)	(1,004)
Write-offs	1,541	104	947
Foreign currency and other	156	1,601	(401)
Valuation allowance end of period	$ (13,370)	$ (9,313)	$ (10,599)