Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
CURRENT ASSETS:
Cash and cash equivalents	$ 27,281	$ 60,610
Restricted cash	291
Short-term investments	76,349	77,265
Accounts receivable, less allowances: 2012, $812; 2011, $1,294	27,683	25,385
Inventories	42,256	36,286
Income taxes receivable	4,090	6,837
Prepaid expenses and other	2,355	2,883
Deferred income taxes	19,811	23,202
Total current assets	200,116	232,468
LONG-TERM INVESTMENTS	4,159	6,857
PROPERTY, PLANT AND EQUIPMENT, NET	60,692	60,884
GOODWILL	6,076
INTANGIBLE ASSETS, NET	7,906
DEFERRED INCOME TAXES	16	6,396
OTHER ASSETS	2,489	1,413
TOTAL	281,454	308,018
CURRENT LIABILITIES:
Accounts payable	21,936	17,096
Accrued compensation	4,167	4,997
Accrued commissions	1,918	1,964
Other accrued liabilities	2,748	2,368
Deferred income on shipments to distributors	25,768	30,671
Total current liabilities	56,537	57,096
LONG-TERM INCOME TAXES PAYABLE	2,759	6,404
LONG-TERM DEFERRED INCOME TAXES	1,054
Total liabilities	60,350	63,500
COMMITMENTS AND CONTINGENCIES (Notes 11 and 13)
SHAREHOLDERS’ EQUITY:
Preferred stock, no par value - authorized: 5,000,000 shares; issued and outstanding: none
Common stock, no par value - authorized: 250,000,000 shares; issued and outstanding: 2012 - 58,153,665 shares; 2011 - 61,038,507 shares		206
Accumulated other comprehensive loss	(532)	(887)
Retained earnings	221,636	245,199
Total shareholders’ equity	221,104	244,518
TOTAL	$ 281,454	$ 308,018