BALANCE SHEET COMPONENTS: (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accounts receivable, net:
Accounts receivable	$ 70,119	$ 57,439
Less: allowance for doubtful accounts	(639)	(639)
Accounts receivable, net	69,480	56,800
Inventories:
Raw materials	4,385	6,240
Work-in-process	12,694	4,667
Finished goods	19,391	32,411
Inventories	36,470	43,318
Deferred taxes and other current assets:
Prepaid expenses	5,929	5,346
Derivative contracts receivable	1,396	2,942
Deferred taxes	7,336	3,813
VAT receivable	1,900	3,000
Other	1,020	515
Deferred taxes and other current assets	17,581	15,616
Property and equipment, net:
Property and equipment, gross	127,885	110,683
Less: Accumulated depreciation and amortization	(55,970)	(48,308)
Property and equipment, net	71,915	62,375
Deferred taxes and other long-term assets:
Equity investments in private companies	7,548	4,424
Deferred taxes	7,155	2,083
Restricted cash	3,514	3,388
Other assets	2,396	524
Deferred taxes and other long-term assets	20,613	10,419
Accrued liabilities:
Payroll and related expenses	27,822	35,348
Accrued expenses	16,106	12,931
Product warranty liability	3,633	4,318	1,097
Other	3,874	3,447
Accrued liabilities	51,011	55,696
Other long-term liabilities:
Income tax payable	13,026	8,838
Deferred rent	3,072	2,797
Other	1,792	347
Other long-term liabilities	17,890	11,982
Computer equipment and software
Property and equipment, net:
Property and equipment, gross	92,468	80,203
Furniture and fixtures
Property and equipment, net:
Property and equipment, gross	3,809	3,890
Leasehold improvements
Property and equipment, net:
Property and equipment, gross	$ 31,608	$ 26,590