CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
CURRENT ASSETS:
Cash and cash equivalents	$ 139,836	$ 155,667
Short-term investments	40,899	27,355
Accounts receivable, net of allowances of $215 and $275 in 2011 and 2010, respectively (Note 2)	9,396	5,713
Inventories	52,010	62,077
Deferred tax assets	892	1,435
Prepaid expenses and other current assets	7,068	9,263
Total current assets	250,101	261,510
INVESTMENTS	32,041	31,760
PROPERTY AND EQUIPMENT, net	88,241	84,470
INTANGIBLE ASSETS, net	8,852	9,795
GOODWILL	14,786	14,826
DEFERRED TAX ASSETS	12,387	13,421
OTHER ASSETS	26,511	17,288
Total assets	432,919	433,070
CURRENT LIABILITIES:
Accounts payable	16,532	20,291
Accrued payroll and related expenses	5,911	7,395
Deferred income on sales to distributors	7,883	12,221
Other accrued liabilities	2,305	9,548
Total current liabilities	32,631	49,455
LONG-TERM INCOME TAXES PAYABLE	34,368	29,580
Total liabilities	66,999	79,035
COMMITMENTS AND CONTINGENCIES (Note 8, 9 and 10)
STOCKHOLDERS’ EQUITY:
Common stock, $0.001 par value Authorized - 140,000,000 shares Outstanding - 28,065,707 and 28,375,363 shares in 2011 and 2010, respectively	28	28
Additional paid-in capital	158,646	175,295
Accumulated other comprehensive income	50	85
Retained earnings	207,196	178,627
Total stockholders’ equity	365,920	354,035
Total liabilities and stockholders’ equity	$ 432,919	$ 433,070