Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Dec. 27, 2014	Dec. 28, 2013
Revenue:
Product	$ 124,481	$ 121,159
Service	18,103	17,251
Total revenue	142,584	138,410
Cost of sales:
Product	75,532	74,625
Service	10,221	9,246
Total cost of sales	85,753	83,871
Gross profit	56,831	54,539
Operating expenses:
Selling and marketing	21,254	21,483
General and administrative	14,202	13,206
Research and development	5,564	5,703
Total operating expenses	41,020	40,392
Income from operations	15,811	14,147
Interest expense, net	(167)	(160)
Other expense, net	(759)	(292)
Income before income taxes	14,885	13,695
Provision for income taxes	1,099	4,550
Net income	$ 13,786	$ 9,145
Basic-
Earnings per share (in dollars per share)	$ 0.91	$ 0.60
Weighted average number of common shares outstanding - basic (in shares)	15,108	15,352
Diluted-
Earnings per share (in dollars per share)	$ 0.90	$ 0.59
Weighted average number of common shares outstanding - diluted (in shares)	15,270	15,539
Dividends declared per share (in dollars per share)	$ 0.30	$ 0.30