Inventories (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Inventory Disclosure [Abstract]
Additional amount that would have been reported in inventory if FIFO method had been used	$ 8,508	$ 7,879
LIFO expense (income)	$ 629	$ (98)	$ (1,560)
Effect of LIFO liquidation on cost of goods sold			$ 1,300