Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Oct. 01, 2011	Oct. 02, 2010	Oct. 01, 2011	Oct. 02, 2010
Consolidated Statements Of Operations [Abstract]
Net sales	$ 53,041	$ 38,073	$ 158,514	$ 108,923
Cost of sales	32,293	24,523	96,147	71,270
Gross profit	20,748	13,550	62,367	37,653
Selling, engineering and administrative expenses	5,249	5,368	17,570	15,369
Operating income	15,499	8,182	44,797	22,284
Interest income, net	(241)	(195)	(590)	(477)
Foreign currency transaction (gain) loss, net	50	14	(36)	56
Miscellaneous income, net	(1,292)	(46)	(1,550)	(175)
Income before income taxes	16,982	8,409	46,973	22,880
Income tax provision	5,588	2,700	15,369	7,747
Net income	$ 11,394	$ 5,709	$ 31,604	$ 15,133
Basic net income per common share	$ 0.44	$ 0.22	$ 1.23	$ 0.60
Weighted average basic shares outstanding	25,652	25,441	25,613	25,428
Diluted net income per common share	$ 0.44	$ 0.22	$ 1.23	$ 0.59
Weighted average diluted shares outstanding	25,701	25,490	25,653	25,478
Dividends declared per share	$ 0.090	$ 0.060	$ 0.313	$ 0.180