CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS, COMPREHENSIVE EARNINGS AND RETAINED EARNINGS (USD $) In Thousands, except Per Share data	3 Months Ended				6 Months Ended
	Jul. 02, 2011		Jul. 03, 2010		Jul. 02, 2011		Jul. 03, 2010
Net product sales	$ 104,884		$ 105,026		$ 213,207		$ 208,270
Rental and royalty revenue	936		997		2,008		2,126
Total revenue	105,820		106,023		215,215		210,396
Product cost of goods sold	71,490		69,360		145,531		137,483
Rental and royalty cost	238		254		508		549
Total costs	71,728		69,614		146,039		138,032
Product gross margin	33,394		35,666		67,676		70,787
Rental and royalty gross margin	698		743		1,500		1,577
Total gross margin	34,092		36,409		69,176		72,364
Selling, marketing and administrative expenses	26,171		22,544		52,135		47,870
Earnings from operations	7,921		13,865		17,041		24,494
Other income (expense), net	1,001		(2,058)		3,993		1,358
Earnings before income taxes	8,922		11,807		21,034		25,852
Provision for income taxes	2,757		3,360		6,869		8,201
Net earnings	6,165		8,447		14,165		17,651
Other comprehensive income, before tax:
Foreign currency translation adjustments	448		(1,342)		1,450		(585)
Unrealized gains on securities	1,965		273		1,776		512
Reclassifications to earnings and changes in fair value of derivatives	(1,607)		(1,257)		(6,860)		(4,539)
Other comprehensive income (loss), before tax	806		(2,326)		(3,634)		(4,612)
Income tax benefit related to items of other comprehensive income	(175)		579		1,747		1,820
Other comprehensive income (loss), net of tax	631		(1,747)		(1,887)		(2,792)
Comprehensive earnings	6,796		6,700		12,278		14,859
Retained earnings at beginning of period	93,725		106,529		137,412		148,582
Net earnings	6,165		8,447		14,165		17,651
Cash dividends	(4,629)		(4,556)		(9,141)		(9,008)
Stock dividends - 3%					(47,175)		(46,805)
Retained earnings at end of period	$ 95,261		$ 110,420		$ 95,261		$ 110,420
Net earnings per share (in dollars per share)	$ 0.11		$ 0.14		$ 0.24		$ 0.30
Dividends per share (in dollars per share)	$ 0.08	[1]	$ 0.08	[1]	$ 0.16	[1]	$ 0.16	[1]
Average number of shares outstanding (in shares)	58,012		58,792		58,050		58,884

[1] Does not include 3% stock dividend to shareholders of record on 3/08/11 and 3/09/10.