BALANCE SHEET COMPONENTS: (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Accounts receivable, net:
Accounts receivable	$ 56,589	$ 65,594
Less: allowance for doubtful accounts	(672)	(672)
Accounts receivable, net	55,917	64,922
Inventories:
Raw materials	8,872	5,725
Work-in-process	18,397	13,874
Finished goods	23,680	24,871
Inventories	50,949	44,470
Deferred taxes and other current assets:
Prepaid expenses	9,252	8,040
Deferred taxes	2,271	2,271
VAT receivable	2,000	6,117
Other	1,943	1,719
Deferred taxes and other current assets	15,466	18,147
Property and equipment, net:
Property and equipment, gross	172,431	160,921
Less: Accumulated depreciation and amortization	(89,282)	(82,094)
Property and equipment, net	83,149	78,827
Deferred taxes and other long-term assets:
Equity investments in private companies	7,739	10,736
Deferred taxes	285	389
Other assets	3,200	4,475
Deferred taxes and other long-term assets	11,224	15,600
Accrued liabilities:
Payroll and related expenses	33,671	31,254
Accrued expenses	21,235	21,171
Derivative contracts payable	3,272	3,562
Product warranty liability	1,441	1,508	4,018
Other	2,903	4,479
Accrued liabilities	62,522	61,974
Other long-term liabilities:
Income tax payable	19,850	18,174
Deferred rent	1,964	2,337
Other	2,519	2,024
Other long-term liabilities	24,333	22,535
Computer equipment and software
Property and equipment, net:
Property and equipment, gross	135,362	124,370
Furniture and fixtures
Property and equipment, net:
Property and equipment, gross	3,270	3,256
Leasehold improvements
Property and equipment, net:
Property and equipment, gross	$ 33,799	$ 33,295