Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Net sales	$ 664,955	$ 608,021	$ 430,147
Cost of sales	408,261	374,149	304,786
Gross profit	256,694	233,872	125,361
Selling, general and administrative expenses	116,740	103,671	88,506
Research and development expenses	19,439	17,602	18,134
Amortization of intangibles	6,611	5,025	5,026
Total operating expenses	142,790	126,298	111,666
Operating income	113,904	107,574	13,695
Interest expense, net	1,691	1,437	2,377
Other expense (income), net	(2,888)	(1,542)	481
Income before income taxes	115,101	107,679	10,837
Income taxes	28,077	29,016	1,426
Net income	$ 87,024	$ 78,663	$ 9,411
Income per share:
Basic (in Dollars per share)	$ 3.96	$ 3.58	$ 0.43
Diluted (in Dollars per share)	$ 3.90	$ 3.52	$ 0.43
Weighted-average shares and equivalent shares outstanding:
Basic (in Shares)	21,901	21,875	21,743
Diluted (in Shares)	22,255	22,214	21,812