Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Oct. 01, 2016
Revenue
Revenue	$ 778,032	$ 787,955	$ 650,147
Cost of sales
Total cost of sales	472,503	485,677	418,743
Gross profit	305,529	302,278	231,404
Operating expenses
Selling and marketing	126,333	124,912	94,992
General and administrative	79,240	87,539	69,313
Research and development	34,784	34,999	25,336
Total operating expenses	240,357	247,450	189,641
Income from operations	65,172	54,828	41,763
Interest expense, net	(25,882)	(30,821)	(8,489)
Other income (expense), net	4,933	(996)	238
Income before income taxes	44,223	23,011	33,512
Income tax provision (benefit)	(17,105)	(2,073)	6,018
Net income	$ 61,328	$ 25,084	$ 27,494
Basic
Basic (in dollars per share)	$ 3.20	$ 1.32	$ 1.72
Weighted average common shares outstanding (in shares)	19,163	19,040	16,027
Diluted
Diluted (in dollars per share)	$ 3.18	$ 1.31	$ 1.70
Weighted average dilutive common shares outstanding (in shares)	19,293	19,137	16,179
Dividends per share (in dollars per share)	$ 1.20	$ 1.20	$ 1.20
Product
Revenue
Revenue	$ 674,391	$ 691,471	$ 562,340
Cost of sales
Cost of goods and services sold	409,525	427,405	365,401
Service
Revenue
Revenue	103,641	96,484	87,807
Cost of sales
Cost of goods and services sold	$ 62,978	$ 58,272	$ 53,342