CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS, COMPREHENSIVE EARNINGS AND RETAINED EARNINGS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 29, 2012		Oct. 01, 2011		Sep. 29, 2012		Oct. 01, 2011
Net product sales	$ 200,274		$ 186,784		$ 418,193		$ 399,991
Rental and royalty revenue	908		1,072		2,948		3,080
Total revenue	201,182		187,856		421,141		403,071
Product cost of goods sold	135,852		132,230		283,615		276,740
Rental and royalty cost	232		264		739		772
Total costs	136,084		132,494		284,354		277,512
Product gross margin	64,422		54,554		134,578		123,251
Rental and royalty gross margin	676		808		2,209		2,308
Total gross margin	65,098		55,362		136,787		125,559
Selling, marketing and administrative expenses	32,685		25,425		84,946		77,560
Earnings from operations	32,413		29,937		51,841		47,999
Other income (expense), net	1,537		(3,777)		4,428		216
Earnings before income taxes	33,950		26,160		56,269		48,215
Provision for income taxes	11,027		7,305		17,061		14,544
Net earnings	22,923		18,855		39,208		33,671
Net earnings per share (in dollars per share)	$ 0.39		$ 0.32		$ 0.67		$ 0.56
Dividends per share (in dollars per share)	$ 0.08	[1]	$ 0.08	[1]	$ 0.24	[1]	$ 0.24	[1]
Average number of shares outstanding	58,714		59,535		58,893		59,692
Other comprehensive income (loss), before tax
Foreign currency translation adjustments	1,303		(3,554)		1,644		(2,104)
Unrealized gains (losses) for the period on investments	869		(68)		837		1,708
Unrealized gains (losses) on investments	869		(68)		837		1,708
Unrealized gains (losses) for the period on derivatives	73		314		(120)		(545)
Less: reclassification adjustment for (gains) losses in net income	41		(1,551)		(241)		(7,552)
Unrealized gains (losses) on derivatives	114		(1,237)		(361)		(8,097)
Total other comprehensive income (loss), before tax	2,286		(4,859)		2,120		(8,493)
Income tax benefit (expense) related to items of other comprehensive income	(378)		599		(169)		2,346
Comprehensive earnings	24,831		14,595		41,159		27,524
Retained earnings at beginning of period	82,931		94,366		114,269		135,866
Net earnings	22,923		18,855		39,208		33,671
Cash dividends	(4,683)		(4,622)		(13,972)		(13,763)
Stock dividends					(38,334)		(47,175)
Retained earnings at end of period	$ 101,171		$ 108,599		$ 101,171		$ 108,599

[1] Does not include 3% stock dividend to shareholders of record on 3/6/12 and 3/8/11.