CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 208,435	$ 218,787
Accounts receivable, net of allowances of $1,380 and $1,565 at September 30, 2013 and December 31, 2012, respectively	40,916	48,881
Inventories, net	46,526	48,417
Deferred tax assets	14,966	20,090
Prepaid expenses and other current assets	8,594	6,022
Total current assets	319,437	342,197
Property and equipment, net	45,459	30,461
Intangible assets, net	15,112	1,859
Goodwill	164,964	119,893
Deferred tax assets	25,041	23,206
Other assets	4,134	2,171
Total assets	574,147	519,787
Current liabilities:
Accounts payable	18,385	12,189
Accrued liabilities	63,851	41,674
Income tax payable	15	286
Other liabilities	280	318
Total current liabilities	82,531	54,467
Deferred tax liabilities	361	354
Other non-current liabilities	19,259	20,200
Total liabilities	102,151	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 September 30, 2013 and December 31, 2012; Redemption value: $87,089	83,548	80,759
Stockholders' equity:
Preferred stock, par value $0.001; Authorized: 4,900 shares; Issued and outstanding: none	0	0
Common stock, par value $0.001; Authorized: 75,000 shares; Issued: 32,299 and 31,949 shares Outstanding: 28,368 and 27,977 shares at September 30, 2013 and December 31, 2012, respectively	28	28
Treasury stock: 3,931 and 3,942 shares at September 30, 2013 and December 31, 2012, respectively	(106,126)	(106,425)
Additional paid-in capital	426,224	413,660
Accumulated other comprehensive income	4,987	5,300
Retained earnings	63,335	51,444
Total stockholders' equity	388,448	364,007
Total liabilities, redeemable convertible preferred stock and stockholders' equity	$ 574,147	$ 519,787