BALANCE SHEET COMPONENTS: (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Accounts receivable, net:
Accounts receivable	$ 117,955	$ 84,894
Less: allowance for doubtful accounts	(632)	(621)
Accounts receivable, net	117,323	84,273
Inventories:
Raw materials	8,878	8,304
Work-in-process	28,038	25,716
Finished goods	27,735	28,453
Inventories	64,651	62,473
Other current assets:
Prepaid expenses	10,212	9,948
Derivative contracts receivable	630	0
VAT receivable	5,734	7,946
Other	3,922	2,085
Other current assets	20,498	19,979
Property and equipment, net:
Property and equipment, net	242,161	212,183
Less: Accumulated depreciation and amortization	(129,897)	(112,165)
Property and equipment, net	112,264	100,018
Deferred taxes and other long-term assets:
Equity investments in private companies	7,846	7,739
Deferred taxes	21,956	23,222
Other assets	1,957	2,754
Deferred taxes and other long-term assets	31,759	33,715
Accrued liabilities:
Payroll and related expenses	50,992	43,041
Accrued expenses	32,359	26,431
Derivative contracts payable	524	1,157
Balance, end of the period	1,365	1,206	$ 1,357
Other	2,365	2,461
Accrued liabilities	87,605	74,296
Other long-term liabilities:
Income tax payable	21,282	20,023
Deferred rent	2,000	1,950
Other	2,935	2,695
Other long-term liabilities	26,217	24,668
Computers, software license rights and other electronic equipments [Member]
Property and equipment, net:
Property and equipment, net	198,980	172,176
Furniture and fixtures {Member]
Property and equipment, net:
Property and equipment, net	4,119	3,886
Leasehold improvements [Member]
Property and equipment, net:
Property and equipment, net	$ 39,062	$ 36,121