CONDENSED CONSOLIDATED STATEMENTS OF INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Net sales:
Products	$ 154,168	$ 155,794	$ 298,928	$ 280,763
Services	189,541	210,230	379,458	399,074
Total net sales	343,709	366,024	678,386	679,837
Costs and expenses:
Products	109,403	120,445	214,015	219,637
Services	155,582	159,938	306,724	314,594
Selling, general and administrative expenses	59,356	79,774	123,114	138,265
Research and development	12,858	6,143	21,878	9,625
Amortization of purchased intangibles	7,873	8,499	17,228	14,954
Restructuring costs	709	311	1,600	(75)
Total costs and expenses	345,781	375,110	684,559	697,000
Operating loss	(2,072)	(9,086)	(6,173)	(17,163)
Other income (expense):
Interest and dividend income	223	339	470	737
Interest expense	(4,305)	(2,579)	(7,845)	(3,917)
Other income (expense), net	(398)	223	(945)	398
Loss before income taxes	(6,552)	(11,103)	(14,493)	(19,945)
Income tax benefit	(7,013)	(21,247)	(12,086)	(24,675)
Net income (loss)	$ 461	$ 10,144	$ (2,407)	$ 4,730
Net income (loss) per share:
Basic (in dollars per share)	$ 0.02	$ 0.38	$ (0.09)	$ 0.18
Diluted (in dollars per share)	0.02	0.38	(0.09)	0.18
Dividends per common share (in dollars per share)	$ 0.14	$ 0.14	$ 0.14	$ 0.14
Weighted average shares used in per share calculations:
Basic (in shares)	27,103	26,973	27,095	26,968
Diluted (in shares)	27,159	26,995	27,095	26,986