GOODWILL AND INTANGIBLE ASSETS: (Details 2) (USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Intangible assets
Gross carrying value of amortizable intangible assets	$ 85,548,000		$ 85,548,000
Accumulated Amortization	(45,840,000)		(43,481,000)
Net carrying value of amortizable intangible assets	39,708,000us-gaap_FiniteLivedIntangibleAssetsNet		42,067,000us-gaap_FiniteLivedIntangibleAssetsNet
Amortization expense of intangible assets	2,400,000us-gaap_AmortizationOfIntangibleAssets	3,600,000us-gaap_AmortizationOfIntangibleAssets
Total amortizable intangible assets, excluding IPR&D
Intangible assets
Gross carrying value of amortizable intangible assets	71,784,000		71,784,000
Accumulated Amortization	(45,840,000)		(43,481,000)
Net carrying value of amortizable intangible assets	25,944,000		28,303,000
Licensed technology
Intangible assets
Gross carrying value of amortizable intangible assets	2,344,000		2,344,000
Accumulated Amortization	(1,054,000)		(917,000)
Net carrying value of amortizable intangible assets	1,290,000		1,427,000
Developed technology
Intangible assets
Gross carrying value of amortizable intangible assets	56,064,000		56,064,000
Accumulated Amortization	(33,768,000)		(32,130,000)
Net carrying value of amortizable intangible assets	22,296,000		23,934,000
Customer relationship
Intangible assets
Gross carrying value of amortizable intangible assets	13,376,000		13,376,000
Accumulated Amortization	(11,018,000)		(10,434,000)
Net carrying value of amortizable intangible assets	2,358,000		2,942,000
In-process research and development
Intangible assets
Gross carrying value of amortizable intangible assets	13,764,000		13,764,000
Net carrying value of amortizable intangible assets	$ 13,764,000		$ 13,764,000

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

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

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-Name Accounting Standards Codification

-Topic 350

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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