CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 229,998	$ 218,787
Accounts receivable, net of allowances of $1,422 and $1,565 at March 31, 2013 and December 31, 2012, respectively	48,922	48,881
Inventories, net	43,363	48,417
Deferred tax assets	16,848	20,090
Prepaid expenses and other current assets	6,551	6,022
Total current assets	345,682	342,197
Property and equipment, net	30,304	30,461
Intangible assets, net	12,220	1,859
Goodwill	119,204	119,893
Deferred tax assets	20,364	23,206
Other assets	607	2,171
Total assets	528,381	519,787
Current liabilities:
Accounts payable	12,436	12,189
Accrued liabilities	35,460	41,674
Deferred revenue	145	285
Deferred tax liabilities	235	33
Income tax payable	225	286
Total current liabilities	48,501	54,467
Deferred tax liabilities	349	354
Other non-current liabilities	20,110	20,200
Total liabilities	68,960	75,021
Commitments and contingencies (Notes 6 and 7)
Series A 3% Redeemable Convertible Preferred Stock, par value $0.001; Authorized: 100 shares; Issued and outstanding: 75 shares at March 31, 2013 and December 31, 2012; Redemption value: $87,089	81,678	80,759
Stockholders' equity:
Preferred stock, par value $0.001; Authorized: 4,900 shares; Issued and outstanding: none
Common stock, par value $0.001; Authorized: 75,000 shares; Issued: 32,130 and 31,949 shares Outstanding: 28,188 and 27,977 shares at March 31, 2013 and December 31, 2012, respectively	28	28
Treasury stock: 3,942 shares at March 31, 2013 and December 31, 2012, respectively	(106,425)	(106,425)
Additional paid-in capital	418,229	413,660
Accumulated other comprehensive income	4,201	5,300
Retained earnings	61,710	51,444
Total stockholders' equity	377,743	364,007
Total liabilities, redeemable convertible preferred stock and stockholders' equity	$ 528,381	$ 519,787