ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS): (AOCI reclassification in earnings) (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2017	Mar. 31, 2016
Reclassifications out of accumulated other comprehensive income
Cost of revenues	$ 64,450	$ 70,481
General and administrative	12,519	27,938
Sales and marketing	35,757	31,228
Research and development	88,491	71,034
Realized (gains)/losses on available-for-sale securities	683	61
Amounts reclassified from accumulated other comprehensive income/loss	(1,440)	422
Reclassification out of Accumulated Other Comprehensive Income [Member] \| Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member]
Reclassifications out of accumulated other comprehensive income
Realized (gains)/losses on available-for-sale securities	(4)	560
Reclassification out of Accumulated Other Comprehensive Income [Member] \| Foreign Exchange Contract [Member] \| Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member]
Reclassifications out of accumulated other comprehensive income
Cost of revenues and Operating expenses:	(1,436)	(138)
Cost of revenues	(84)	(12)
General and administrative	(115)	33
Sales and marketing	(145)	(21)
Research and development	$ (1,092)	$ (138)

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
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-Section S99
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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