Consolidated Statements of Net Income (unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012		Sep. 28, 2013	Sep. 29, 2012
Net sales	$ 201,040	$ 172,688		$ 559,724	$ 509,119
Cost of sales	120,080	104,052		340,601	310,059
Gross profit	80,960	68,636		219,123	199,060
Selling, general and administrative expenses	34,437	30,601		98,091	90,199
Research and development expenses	6,217	5,505		17,725	15,553
Amortization of intangibles	2,747	1,599		6,249	4,457
	43,401	37,705		122,065	110,209
Operating income	37,559	30,931		97,058	88,851
Interest expense	939	454		1,959	1,298
Impairment and equity in net loss of unconsolidated affiliate		1,965		10,678	3,523
Foreign exchange (gain) loss	1,476	834		(1,929)	1,903
Other (income) expense, net	(1,380)	(1,350)		(3,543)	(3,075)
Income before income taxes	36,524	29,028	[1]	89,893	85,202	[1]
Income taxes	9,534	6,250		21,461	21,898
Net income	$ 26,990	$ 22,778		$ 68,432	$ 63,304
Net income per share (see Note 9):
Basic (in Dollars per share)	$ 1.20	$ 1.04		$ 3.07	$ 2.90
Diluted (in Dollars per share)	$ 1.19	$ 1.03		$ 3.04	$ 2.87
Weighted average shares and equivalent shares outstanding:
Basic (in Shares)	22,428	21,923		22,274	21,770
Diluted (in Shares)	22,625	22,162		22,497	22,055
Cash dividends paid per common share (in Dollars per share)	$ 0.22	$ 0.20		$ 0.62	$ 0.56

[1] 2012 Income before income taxes has been restated to reflect the company's retroactive equity losses from Shocking Technologies. (See Note 2).