CONDENSED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $) In Thousands	9 Months Ended
	Oct. 01, 2011	Oct. 02, 2010
Operating Activities
Net income	$ 29,496	$ 22,541
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation	8,792	6,863
Slow moving inventory valuation adjustment	(35)	(692)
Stock-based compensation	2,110	1,711
Loss (Gain) on sale of assets	(82)	5
Deferred income taxes	1,376	649
Changes in operating assets and liabilities:
Trade receivables	(1,856)	(885)
Inventories	2,107	(165)
Trade accounts payable and accrued expenses	2,870	(1,477)
Employee compensation and benefits	1,007	(3,905)
Product liability	454	(995)
Prepaid expenses, other assets and other liabilities	(4,419)	933
Income taxes payable	1,147	(1,085)
Cash provided by operating activities	42,967	23,498
Investing Activities
Property, plant and equipment additions	(12,209)	(16,416)
Proceeds from sale of assets	127	21
Purchases of short-term investments	(122,978)	(112,473)
Proceeds from maturities of short-term investments	149,473	115,722
Cash provided by (used for) investing activities	14,413	(13,146)
Financing Activities
Tax benefit from exercise of stock options	3,087	698
Repurchase of common stock	(1,999)	(5,717)
Payment of employee withholding tax related to share-based compensation	(4,782)
Dividends paid	(5,474)	(4,849)
Cash used for financing activities	(9,168)	(9,868)
Increase in cash and cash equivalents	48,212	484
Cash and cash equivalents at beginning of period	5,132	5,008
Cash and cash equivalents at end of period	$ 53,344	$ 5,492