Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Revenues	$ 176,733	$ 150,800	$ 499,533	$ 484,967
Cost of goods sold	143,789	121,158	421,219	385,239
Gross profit	32,944	29,642	78,314	99,728
Selling, general and administrative expenses	18,013	23,024	58,293	66,750
Research and development expenses	1,642	1,791	5,108	5,787
Amortization of intangible assets	114	122	345	658
Restructuring and separation expenses	1,406		2,738
Operating income	11,769	4,705	11,830	26,533
Other income	(507)	(507)	(1,893)	(1,014)
Interest expense	42	36	111	141
Interest income		(4)	(88)	(10)
Income from continuing operations before income taxes	12,234	5,180	13,700	27,416
Income tax provision	5,185	2,233	10,573	10,226
Income from continuing operations	7,049	2,947	3,127	17,190
Income from discontinued operations, net of tax (Note J)				9,604
Net income	$ 7,049	$ 2,947	$ 3,127	$ 26,794
Earnings per share:
Continuing operations	$ 0.60	$ 0.25	$ 0.26	$ 1.43
Discontinued operations				0.80
Basic earnings per share	0.60	0.25	0.26	2.23
Continuing operations	0.60	0.24	0.26	1.43
Discontinued operations				0.80
Diluted earnings per share	$ 0.60	$ 0.24	$ 0.26	$ 2.23
Weighted average shares:
Basic	11,802	12,015	11,953	12,004
Diluted	11,845	12,075	11,991	12,063
Dividends per share	$ 0.26	$ 0.25	$ 0.78	$ 0.75