Consolidated Statements of Net Income (unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 28, 2015		Mar. 29, 2014
Net sales	$ 210,313	[1]	$ 206,859	[1]
Cost of sales	133,983		128,365
Gross profit	76,330		78,494
Selling, general and administrative expenses	36,345		34,171
Research and development expenses	7,384		7,574
Amortization of intangibles	3,053		3,159
	46,782		44,904
Operating income	29,548		33,590
Interest expense	1,151		1,216
Foreign exchange loss (gain)	3,117		(252)
Other (income) expense, net	(1,126)		(1,186)
Income before income taxes	26,406		33,812
Income taxes	6,411		8,423
Net income	$ 19,995		$ 25,389
Net income per share (see note 7):
Basic (in Dollars per share)	$ 0.88		$ 1.13
Diluted (in Dollars per share)	$ 0.88		$ 1.12
Weighted average shares and equivalent shares outstanding:
Basic (in Shares)	22,600		22,492
Diluted (in Shares)	22,781		22,717
Cash dividends paid per common share (in Dollars per share)	$ 0.25		$ 0.22

[1] Sales by country represent sales to customer or distributor locations.