Business Segment Information (Schedule Of Geographic Information Net Sales) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Net Sales	$ 153,612	$ 134,191	$ 128,941	$ 120,547	$ 151,413	$ 130,495	$ 124,762	$ 124,450	$ 537,291	$ 531,120	$ 490,079
United States [Member]
Net Sales									385,500	374,000	336,400
Asia [Member]
Net Sales									70,400	59,900	59,500
Europe [Member]
Net Sales									46,600	62,000	51,500
Canada [Member]
Net Sales									11,600	10,400	14,300
India [Member]
Net Sales									4,300	3,300	10,200
Other [Member]
Net Sales									$ 18,900	$ 21,500	$ 18,200