CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
CURRENT ASSETS:
Cash and cash equivalents	$ 79,060	$ 92,928
Short-term marketable securities	133,354	109,179
Accounts receivable, net of allowances of $105 and $120 in 2014 and 2013, respectively (Note 2)	16,443	12,389
Inventories	51,269	42,235
Deferred tax assets	2,011	2,059
Prepaid expenses and other current assets	13,590	18,632
Total current assets	295,727	277,422
PROPERTY AND EQUIPMENT, net	91,368	90,141
INTANGIBLE ASSETS, net	36,960	40,334
GOODWILL	80,599	80,599
DEFERRED TAX ASSETS (Note 9)	8,904	9,449
OTHER ASSETS	4,031	3,476
Total assets	517,589	501,421
CURRENT LIABILITIES:
Accounts payable	22,802	20,772
Accrued payroll and related expenses	8,786	8,900
Taxes payable	2,054	2,266
Deferred tax liabilities	1,110	943
Deferred income on sales to distributors	19,128	15,727
Other accrued liabilities	1,701	1,810
Total current liabilities	55,581	50,418
LONG-TERM INCOME TAXES PAYABLE (Note 9)	2,397	6,885
DEFERRED TAX LIABILITIES	4,647	5,273
OTHER LIABILITIES	2,301	2,159
Total liabilities	64,926	64,735
COMMITMENTS AND CONTINGENCIES (Notes 9, 11 and 12)
STOCKHOLDERS’ EQUITY:
Common stock	30	30
Additional paid-in capital	216,337	223,660
Accumulated other comprehensive loss	(190)	(470)
Retained earnings	236,486	213,466
Total stockholders’ equity	452,663	436,686
Total liabilities and stockholders’ equity	$ 517,589	$ 501,421