Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Revenues	$ 133,207	$ 176,733	$ 435,450	$ 499,533
Cost of goods sold	105,922	143,789	354,921	421,219
Gross profit	27,285	32,944	80,529	78,314
Selling, general and administrative expenses	19,362	18,013	57,787	58,293
Research and development expenses	1,640	1,642	5,453	5,108
Amortization of intangible assets	89	114	263	345
Restructuring and separation expenses	647	1,406	7,703	2,738
Operating income	5,547	11,769	9,323	11,830
Other income	(507)	(507)	(1,522)	(1,893)
Interest expense	38	42	112	111
Interest income	(42)		(113)	(88)
Income before income taxes	6,058	12,234	10,846	13,700
Income tax provision	1,164	5,185	844	10,573
Net income	$ 4,894	$ 7,049	$ 10,002	$ 3,127
Income per share:
Basic	$ 0.43	$ 0.60	$ 0.88	$ 0.26
Diluted	$ 0.43	$ 0.60	$ 0.87	$ 0.26
Weighted average shares:
Basic	11,397	11,802	11,387	11,953
Diluted	11,473	11,845	11,435	11,991
Dividends per share	$ 0.26	$ 0.26	$ 0.78	$ 0.78