BUSINESS COMBINATION: (Details) - USD ($)			1 Months Ended	6 Months Ended
	Feb. 23, 2016	Nov. 17, 2015	Sep. 30, 2015	Jun. 30, 2016
Business Acquisition [Line Items]
Effective date of acquisition	Feb. 23, 2016
Name of acquired entity	EZchip
Date of acquisition agreement		Nov. 17, 2015	Sep. 30, 2015
Cash payment for all outstanding common stock of EZchip at $25.50 per share	$ 787,018,000
Consideration transferred	$ 698,500,000
EZchip purchase price (in USD per share)	$ 25.50
Cash acquired	$ 87,500,000			$ 87,500,000
Current liabilities	10,253,000
Compensation not yet recognized, stock options	$ 22,200,000
Service period (in years)	2 years 2 months 29 days			2 years 4 months 24 days
Debt instrument, face amount	$ 280,000,000			$ 273,000,000
Debt instrument, maturity date	Feb. 21, 2019
Restricted Stock Units (RSUs) [Member]
Business Acquisition [Line Items]
Consideration transferred	$ 1,000,000
Conversion of stock, shares converted	499,894
Employee Stock Option [Member]
Business Acquisition [Line Items]
Share price (in USD per share)	$ 46.40			$ 47.96
Accounts Payable and Accrued Liabilities [Member]
Business Acquisition [Line Items]
Current liabilities	$ 17,300,000
EZchip [Member]
Business Acquisition [Line Items]
Cash payment for all outstanding common stock of EZchip at $25.50 per share	786,046,000
Aggregate intrinsic value, nonvested shares	$ 23,200,000
EZchip [Member] | Restricted Stock Units (RSUs) [Member]
Business Acquisition [Line Items]
Conversion of stock, shares converted	891,822