Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 29, 2012
Revenue:
Product	$ 487,011	$ 497,620	$ 476,306
Service	77,317	71,819	65,950
Total Revenue	564,328	569,439	542,256
Cost of Sales:
Product	296,449	296,256	272,706
Service	44,236	41,244	33,358
Total Cost of Sales	340,685	337,500	306,064
Gross Profit	223,643	231,939	236,192
Operating Expenses:
Selling and marketing	88,136	81,009	74,637
General and administrative	51,407	48,163	51,401
Research and development	23,844	22,812	21,893
U.S. Government settlement			7,750
Total Operating Expenses	163,387	151,984	155,681
Income From Operations	60,256	79,955	80,511
Interest expense, net	(692)	(334)	(305)
Other expense, net	(1,121)	(367)	(426)
Income Before Income Taxes	58,443	79,254	79,780
Provision for Income Taxes	16,434	21,448	28,224
Net Income	$ 42,009	$ 57,806	$ 51,556
Earnings Per Share
Basic (in dollars per share)	$ 2.76	$ 3.69	$ 3.24
Diluted (in dollars per share)	$ 2.73	$ 3.64	$ 3.21
Dividends declared per share	$ 1.20	$ 1.20	$ 1.05