Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Jul. 01, 2011	Jul. 02, 2010	Jul. 01, 2011	Jul. 02, 2010
Net sales	$ 122,481	$ 123,954	$ 330,045	$ 307,311
Cost of sales	71,953	72,467	195,904	184,082
Gross profit	50,528	51,487	134,141	123,229
Operating expenses:
Marketing and selling	25,814	23,974	72,622	66,848
Administrative management, finance and information systems	9,326	10,646	28,902	28,762
Research and development	3,578	3,514	10,718	9,767
Total operating expenses	38,718	38,134	112,242	105,377
Operating profit	11,810	13,353	21,899	17,852
Interest income	(16)	(26)	(63)	(46)
Interest expense	979	1,393	2,842	4,014
Other expense (income), net	1,741	565	2,078	94
Income before income taxes	9,106	11,421	17,042	13,790
Income tax expense	988	989	1,675	1,411
Net income	$ 8,118	$ 10,432	$ 15,367	$ 12,379
Earnings Per Share, Diluted, Other Disclosures [Abstract]
Dilutive stock options	29	43	34	43
Weighted average common shares - Dilutive	9,291	9,290	9,293	9,260
Class A [Member]
Weighted average common shares - Basic:
Weighted average common shares, Basic	8,046	8,031	8,043	8,001
Earnings Per Share
Earnings Per Share, Basic	$ 0.84	$ 1.10	$ 1.60	$ 1.31
Earnings Per Share, Diluted	$ 0.83	$ 1.09	$ 1.58	$ 1.30
Class B [Member]
Weighted average common shares - Basic:
Weighted average common shares, Basic	1,216	1,216	1,216	1,216
Earnings Per Share
Earnings Per Share, Basic	$ 0.76	$ 1.00	$ 1.45	$ 1.19
Earnings Per Share, Diluted	$ 0.83	$ 1.09	$ 1.58	$ 1.30