CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES (Details 3) - Recurring - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Level 1
Fair value hierarchy for financial assets and liabilities
Assets	$ 33,595	$ 290,113
Level 1 \| Corporate debt securities
Fair value hierarchy for financial assets and liabilities
Assets	22,313	110,190
Level 1 \| Money market funds
Fair value hierarchy for financial assets and liabilities
Assets	11,282	179,923
Level 2
Fair value hierarchy for financial assets and liabilities
Assets	35,416	253,837
Level 2 \| Commercial Paper
Fair value hierarchy for financial assets and liabilities
Assets	35,416	253,837
Level 3
Fair value hierarchy for financial assets and liabilities
Unfavorable contract assumed	661	3,343
Liabilities	15,381	17,595
Level 3 \| Zipsor
Fair value hierarchy for financial assets and liabilities
Liabilities, contingent consideration	1,575	1,800
Level 3 \| Lazanda
Fair value hierarchy for financial assets and liabilities
Liabilities, contingent consideration	11,751	11,209
Level 3 \| CAMBIA
Fair value hierarchy for financial assets and liabilities
Liabilities, contingent consideration	1,394	1,243
Fair Value
Fair value hierarchy for financial assets and liabilities
Assets	69,011	543,950
Unfavorable contract assumed	661	3,343
Liabilities	15,381	17,595
Fair Value \| Zipsor
Fair value hierarchy for financial assets and liabilities
Liabilities, contingent consideration	1,575	1,800
Fair Value \| Lazanda
Fair value hierarchy for financial assets and liabilities
Liabilities, contingent consideration	11,751	11,209
Fair Value \| CAMBIA
Fair value hierarchy for financial assets and liabilities
Liabilities, contingent consideration	1,394	1,243
Fair Value \| Corporate debt securities
Fair value hierarchy for financial assets and liabilities
Assets	22,313	110,190
Fair Value \| Money market funds
Fair value hierarchy for financial assets and liabilities
Assets	11,282	179,923
Fair Value \| Commercial Paper
Fair value hierarchy for financial assets and liabilities
Assets	$ 35,416	$ 253,837

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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

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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

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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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