BALANCE SHEET COMPONENTS: (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014
Accounts receivable, net:
Accounts receivable	$ 61,640	$ 65,594
Less: allowance for doubtful accounts	(636)	(672)
Accounts receivable, net	61,004	64,922
Inventories:
Raw materials	9,030	5,725
Work-in-process	22,733	13,874
Finished goods	31,042	24,871
Inventories	62,805	44,470
Deferred taxes and other current assets:
Prepaid expenses	7,818	8,040
Derivative contracts receivable	2,186
Deferred taxes	2,271	2,271
VAT receivable	5,520	6,117
Other	4,085	1,719
Deferred taxes and other current assets	21,880	18,147
Property and equipment, net:
Property and equipment, gross	188,513	160,921
Less: Accumulated depreciation and amortization	(96,253)	(82,094)
Property and equipment, net	92,260	78,827
Deferred taxes and other long-term assets:
Equity investments in private companies	7,739	10,736
Deferred taxes	255	389
Other assets	1,819	4,475
Deferred taxes and other long-term assets	9,813	15,600
Accrued liabilities:
Payroll and related expenses	41,092	31,254
Accrued expenses	27,425	21,171
Derivative contracts payable		3,562
Product warranty liability	1,357	1,508	$ 3,455
Other	3,573	4,479
Accrued liabilities	73,447	61,974
Other long-term liabilities:
Income tax payable	21,593	18,174
Deferred rent	1,989	2,337
Other	2,694	2,024
Other long-term liabilities	26,276	22,535
Computer equipment and software
Property and equipment, net:
Property and equipment, gross	151,188	124,370
Furniture and fixtures
Property and equipment, net:
Property and equipment, gross	3,323	3,256
Leasehold improvements
Property and equipment, net:
Property and equipment, gross	$ 34,002	$ 33,295