CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS, COMPREHENSIVE EARNINGS AND RETAINED EARNINGS (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
Net product sales	$ 186,784		$ 191,045		$ 399,991		$ 399,315
Rental and royalty revenue	1,072		1,080		3,080		3,206
Total revenue	187,856		192,125		403,071		402,521
Product cost of goods sold	133,041		129,021		278,572		266,504
Rental and royalty cost	264		274		772		823
Total costs	133,305		129,295		279,344		267,327
Product gross margin	53,743		62,024		121,419		132,811
Rental and royalty gross margin	808		806		2,308		2,383
Total gross margin	54,551		62,830		123,727		135,194
Selling, marketing and administrative expenses	25,425		31,242		77,560		79,112
Earnings from operations	29,126		31,588		46,167		56,082
Other income (expense), net	(3,777)		4,618		216		5,976
Earnings before income taxes	25,349		36,206		46,383		62,058
Provision for income taxes	7,011		9,722		13,880		17,923
Net earnings	18,338		26,484		32,503		44,135
Other comprehensive income (loss):
Foreign currency translation adjustments	(3,554)		183		(2,104)		(402)
Unrealized gains (losses) on securities	(68)		(2,322)		1,708		(1,810)
Unrealized gains (losses) on derivatives	314		4,451		(545)		1,449
Reclassification of realized gains on derivatives to net earnings	(1,551)		(906)		(7,552)		(2,443)
Other comprehensive income (loss), before tax	(4,859)		1,406		(8,493)		(3,206)
Income tax (expense) benefit related to items of other comprehensive income	599		(388)		2,346		1,432
Other comprehensive income (loss), net of tax	(4,260)		1,018		(6,147)		(1,774)
Comprehensive earnings	14,078		27,502		26,356		42,361
Retained earnings at beginning of period	95,261		110,420		137,412		148,582
Net earnings	18,338		26,484		32,503		44,135
Cash dividends	(4,622)		(4,548)		(13,763)		(13,556)
Stock dividends - 3%					(47,175)		(46,805)
Retained earnings at end of period	$ 108,977		$ 132,356		$ 108,977		$ 132,356
Net earnings per share (in dollars per share)	$ 0.32		$ 0.45		$ 0.56		$ 0.75
Dividends per share (in dollars per share)	$ 0.08	[1]	$ 0.08	[1]	$ 0.24	[1]	$ 0.24	[1]
Average number of shares outstanding (in shares)	57,822		58,596		57,978		58,795

[1] Does not include 3% stock dividend to shareholders of record on 3/8/11 and 3/9/10.