CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 306,386	$ 240,675
Restricted cash	1,575	4,026
Marketable securities, short-term	28,485	7,395
Accounts receivable, net of allowance for doubtful accounts and returns of $2,484 and $780, respectively	98,992	91,537
Inventories	15,122	9,402
Prepaid expenses and other current assets	35,233	31,781
Total current assets	485,793	384,816
Marketable securities, long-term	21,252	0
Property, plant and equipment, net	79,191	53,965
Goodwill	99,236	135,383
Intangible assets, net	45,777	50,022
Deferred tax assets	21,609	22,337
Other assets	3,454	2,741
Total assets	756,312	649,264
Current liabilities:
Accounts payable	19,549	19,265
Accrued liabilities	74,247	76,600
Deferred revenues	61,975	52,252
Total current liabilities	155,771	148,117
Other long-term liabilities	19,224	10,366
Total liabilities	174,995	158,483
Commitments and contingencies (Notes 7 and 9)
Stockholders' equity:
Preferred stock, $0.0001 par value (5,000 shares authorized; none issued)	0	0
Common stock, $0.0001 par value (200,000 shares authorized; 80,611 and 78,776 issued and outstanding in 2012 and 2011, respectively)	8	8
Additional paid-in capital	670,732	607,240
Accumulated other comprehensive income, net	203	46
Accumulated deficit	(89,626)	(116,513)
Total stockholders' equity	581,317	490,781
Total liabilities and stockholders' equity	$ 756,312	$ 649,264