CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES (Details 3) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Level 3
Fair value hierarchy for financial assets and liabilities
Unfavorable contract assumed		$ 3,343
Recurring
Fair value hierarchy for financial assets and liabilities
Assets	$ 119,076	543,950
Unfavorable contract assumed		3,343
Liabilities	14,863	17,595
Recurring \| Zipsor
Fair value hierarchy for financial assets and liabilities
Liabilities, contingent consideration	1,448	1,800
Recurring \| Lazanda
Fair value hierarchy for financial assets and liabilities
Liabilities, contingent consideration	11,978	11,209
Recurring \| CAMBIA
Fair value hierarchy for financial assets and liabilities
Liabilities, contingent consideration	1,437	1,243
Recurring \| Corporate debt securities
Fair value hierarchy for financial assets and liabilities
Assets	41,513	110,190
Recurring \| U.S. Treasury securities
Fair value hierarchy for financial assets and liabilities
Assets	16,165
Recurring \| Money market funds
Fair value hierarchy for financial assets and liabilities
Assets	4,411	179,923
Recurring \| Commercial Paper
Fair value hierarchy for financial assets and liabilities
Assets	56,987	253,837
Recurring \| Level 1
Fair value hierarchy for financial assets and liabilities
Assets	62,089	290,113
Recurring \| Level 1 \| Corporate debt securities
Fair value hierarchy for financial assets and liabilities
Assets	41,513	110,190
Recurring \| Level 1 \| U.S. Treasury securities
Fair value hierarchy for financial assets and liabilities
Assets	16,165
Recurring \| Level 1 \| Money market funds
Fair value hierarchy for financial assets and liabilities
Assets	4,411	179,923
Recurring \| Level 2
Fair value hierarchy for financial assets and liabilities
Assets	56,987	253,837
Recurring \| Level 2 \| Commercial Paper
Fair value hierarchy for financial assets and liabilities
Assets	56,987	253,837
Recurring \| Level 3
Fair value hierarchy for financial assets and liabilities
Unfavorable contract assumed		3,343
Liabilities	14,863	17,595
Recurring \| Level 3 \| Zipsor
Fair value hierarchy for financial assets and liabilities
Liabilities, contingent consideration	1,448	1,800
Recurring \| Level 3 \| Lazanda
Fair value hierarchy for financial assets and liabilities
Liabilities, contingent consideration	11,978	11,209
Recurring \| Level 3 \| CAMBIA
Fair value hierarchy for financial assets and liabilities
Liabilities, contingent consideration	$ 1,437	$ 1,243

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- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

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- Definition

Amount of liability recognized arising from contingent consideration in a business combination.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 35

-Paragraph 1

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Aggregation of the liabilities reported on the balance sheet measured at fair value on a recurring basis by the entity.

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