Consolidated Statements of Income (unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011
Revenue:
Product	$ 125,339	$ 100,363	$ 355,578	$ 287,293
Service	16,358	16,469	48,835	48,476
Total revenue	141,697	116,832	404,413	335,769
Cost of sales:
Product	69,831	58,368	201,351	165,697
Service	8,198	8,634	24,291	24,663
Total cost of sales	78,029	67,002	225,642	190,360
Gross profit	63,668	49,830	178,771	145,409
Operating expenses:
Selling and marketing	19,596	17,462	55,811	51,192
General and administrative	20,793	12,892	47,906	31,712
Research and development	5,097	3,852	16,124	10,538
Total operating expenses	45,486	34,206	119,841	93,442
Income from operations	18,182	15,624	58,930	51,967
Interest income (expense), net	264	(74)	(154)	(824)
Other income (expense), net	81	856	(341)	973
Income before income taxes	18,527	16,406	58,435	52,116
Provision for income taxes	8,918	5,453	22,130	16,066
Net income	$ 9,609	$ 10,953	$ 36,305	$ 36,050
Basic-
Earnings per share (in dollars per share)	$ 0.60	$ 0.70	$ 2.29	$ 2.34
Weighted average number of common shares outstanding - basic (in shares)	16,048,000	15,570,000	15,878,000	15,435,000
Diluted-
Earnings per share (in dollars per share)	$ 0.59	$ 0.69	$ 2.26	$ 2.29
Weighted average number of common shares outstanding - diluted (in shares)	16,197,000	15,789,000	16,045,000	15,718,000
Dividends declared per share (in dollars per share)	$ 0.25	$ 0.20	$ 0.75	$ 0.60