Consolidated Statements of Income (unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Dec. 29, 2012	Dec. 31, 2011
Revenue:
Product	$ 124,621	$ 117,451
Service	18,047	16,246
Total revenue	142,668	133,697
Cost of sales:
Product	75,960	66,872
Service	10,106	8,112
Total cost of sales	86,066	74,984
Gross profit	56,602	58,713
Operating expenses:
Selling and marketing	19,179	17,009
General and administrative	12,314	13,196
Research and development	5,052	4,959
Total operating expenses	36,545	35,164
Income from operations	20,057	23,549
Interest income (expense), net	6	(206)
Other income (expense), net	452	(23)
Income before income taxes	20,515	23,320
Provision for income taxes	6,732	7,781
Net income	$ 13,783	$ 15,539
Basic-
Earnings per share (in dollars per share)	$ 0.88	$ 0.99
Weighted average number of common shares outstanding - basic (in shares)	15,669	15,681
Diluted-
Earnings per share (in dollars per share)	$ 0.87	$ 0.98
Weighted average number of common shares outstanding - diluted (in shares)	15,845	15,832
Dividends declared per share (in dollars per share)	$ 0.30	$ 0.25