Consolidated Statements of Income (unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Revenue:
Product	$ 118,396	$ 125,339	$ 362,810	$ 355,578
Service	16,663	16,358	51,834	48,835
Total revenue	135,059	141,697	414,644	404,413
Cost of sales:
Product	70,511	69,831	220,030	201,351
Service	9,952	8,198	29,511	24,291
Total cost of sales	80,463	78,029	249,541	225,642
Gross profit	54,596	63,668	165,103	178,771
Operating expenses:
Selling and marketing	20,337	19,596	59,035	55,811
General and administrative	11,620	13,043	37,109	40,156
Research and development	6,211	5,097	16,851	16,124
U.S. Government settlement		7,750		7,750
Total operating expenses	38,168	45,486	112,995	119,841
Income from operations	16,428	18,182	52,108	58,930
Interest (expense) income, net	(50)	264	(194)	(154)
Other income (expense), net	405	81	(97)	(341)
Income before income taxes	16,783	18,527	51,817	58,435
Provision for income taxes	5,236	8,918	15,426	22,130
Net income	$ 11,547	$ 9,609	$ 36,391	$ 36,305
Basic-
Earnings per share (in dollars per share)	$ 0.73	$ 0.60	$ 2.32	$ 2.29
Weighted average number of common shares outstanding - basic (in shares)	15,733	16,048	15,708	15,878
Diluted-
Earnings per share (in dollars per share)	$ 0.72	$ 0.59	$ 2.29	$ 2.26
Weighted average number of common shares outstanding - diluted (in shares)	15,945	16,197	15,906	16,045
Dividends declared per share (in dollars per share)	$ 0.30	$ 0.25	$ 0.90	$ 0.75