Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Revenue
Revenue	$ 194,668	$ 193,764	$ 580,153	$ 586,467
Cost of Sales
Total cost of sales	118,384	118,208	351,116	358,591
Gross profit	76,284	75,556	229,037	227,876
Operating expenses
Selling and marketing	32,171	31,857	94,796	92,954
General and administrative	19,081	18,726	58,635	66,305
Research and development	8,768	8,356	26,235	26,298
Total operating expenses	60,020	58,939	179,666	185,557
Income from operations	16,264	16,617	49,371	42,319
Interest expense, net	(6,249)	(7,711)	(19,761)	(22,409)
Other income (expense), net	30	(923)	81	(1,086)
Income before income taxes	10,045	7,983	29,691	18,824
Income tax provision (benefit)	1,066	(2,627)	(20,877)	(690)
Net income	$ 8,979	$ 10,610	$ 50,568	$ 19,514
Basic
Earnings per share (in dollars per share)	$ 0.47	$ 0.56	$ 2.64	$ 1.03
Weighted average common shares outstanding (in shares)	19,174	19,052	19,149	19,012
Diluted
Earnings per share (in dollars per share)	$ 0.47	$ 0.55	$ 2.62	$ 1.02
Weighted average common shares outstanding (in shares)	19,305	19,138	19,269	19,108
Dividends declared per share (in dollars per share)	$ 0.30	$ 0.30	$ 0.90	$ 0.90
Product
Revenue
Revenue	$ 168,651	$ 167,592	$ 503,345	$ 514,987
Cost of Sales
Cost of goods and services sold	103,182	101,629	304,809	316,012
Service
Revenue
Revenue	26,017	26,172	76,808	71,480
Cost of Sales
Cost of goods and services sold	$ 15,202	$ 16,579	$ 46,307	$ 42,579