ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS): (AOCI reclassifcation in earnings) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Reclassifications out of accumulated other comprehensive income
Amounts reclassified from accumulated other comprehensive income/loss	$ (321)	$ (3,027)
Cost of revenues and operating expenses [Member]
Reclassifications out of accumulated other comprehensive income
Gains/losses on derivatives	161	(3,010)
Cost of revenues [Member]
Reclassifications out of accumulated other comprehensive income
Gains/losses on derivatives	10	(205)
Research and development expense [Member]
Reclassifications out of accumulated other comprehensive income
Gains/losses on derivatives	112	(2,251)
Sales and marketing [Member]
Reclassifications out of accumulated other comprehensive income
Gains/losses on derivatives	17	(234)
General and administrative expense [Member]
Reclassifications out of accumulated other comprehensive income
Gains/losses on derivatives	22	(320)
Other nonoperating income (expense) [Member]
Reclassifications out of accumulated other comprehensive income
Gains/losses on Available-for-Sale Securities	$ (482)	$ (17)