ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS): (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Reclassifications out of accumulated other comprehensive income
Cost of revenues	$ (41,087)us-gaap_CostOfRevenue	$ (33,731)us-gaap_CostOfRevenue
Research and development	(58,118)us-gaap_ResearchAndDevelopmentExpense	(48,337)us-gaap_ResearchAndDevelopmentExpense
Sales and marketing	(22,558)us-gaap_SellingAndMarketingExpense	(19,279)us-gaap_SellingAndMarketingExpense
General and administrative	(9,701)us-gaap_GeneralAndAdministrativeExpense	(8,215)us-gaap_GeneralAndAdministrativeExpense
Cost of revenues and Operating expenses	15,211us-gaap_OperatingIncomeLoss	(10,560)us-gaap_OperatingIncomeLoss
Other income, net	(2,469)us-gaap_NonoperatingIncomeExpense	234us-gaap_NonoperatingIncomeExpense
Net income (loss)	10,496	(10,980)
Amount Reclassified from Other Comprehensive Income / Loss
Reclassifications out of accumulated other comprehensive income
Net income (loss)	(2,270)	(695)
Gains / Losses on Derivatives \| Amount Reclassified from Other Comprehensive Income / Loss
Reclassifications out of accumulated other comprehensive income
Cost of revenues	(153)	(42)
Research and development	(1,690)	(532)
Sales and marketing	(175)	(63)
General and administrative	(255)	(63)
Cost of revenues and Operating expenses	(2,273)	(700)
Unrealized Gains / Losses on Available-for-Sale Securities \| Amount Reclassified from Other Comprehensive Income / Loss
Reclassifications out of accumulated other comprehensive income
Other income, net	$ 3	$ 5

The aggregate cost of goods produced and sold and services rendered during the reporting period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 2

-Article 5

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 45

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.7)

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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Section 50

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