MARKETABLE SECURITIES (Details 4) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014	Sep. 09, 2014
Convertible Debt
Estimated fair value of debt instruments
Interest rate (as a percent)			2.50%	2.50%
Par value of debt			$ 345,000,000	$ 345,000,000
Level 2 | Convertible Debt | Fair Value
Estimated fair value of debt instruments
Estimated fair value of debt			375,200,000
Contingent consideration | Level 3
Changes in fair value of all financial liabilities measured at fair value on a recurring basis
Net accretion value adjustments	900,000	100,000
Balance at the end of the period	14,804,000		17,595,000
Unfavorable contract assumed	3,540,000		3,343,000
Contingent consideration | Level 3 | Interest Expense.
Changes in fair value of all financial liabilities measured at fair value on a recurring basis
Unfavorable contract assumed			445,000
Change in fair value			2,373,000
Contingent consideration | Level 3 | Selling general and administrative expense
Changes in fair value of all financial liabilities measured at fair value on a recurring basis
Unfavorable contract assumed			(642,000)
Change in fair value			418,000
Contingent consideration | Level 3 | Zipsor
Changes in fair value of all financial liabilities measured at fair value on a recurring basis
Balance at the end of the period	1,638,000		1,800,000
Contingent consideration | Level 3 | Zipsor | Interest Expense.
Changes in fair value of all financial liabilities measured at fair value on a recurring basis
Change in fair value			162,000
Contingent consideration | Level 3 | Lazanda
Changes in fair value of all financial liabilities measured at fair value on a recurring basis
Balance at the end of the period	8,616,000		11,209,000
Contingent consideration | Level 3 | Lazanda | Interest Expense.
Changes in fair value of all financial liabilities measured at fair value on a recurring basis
Change in fair value			1,533,000
Contingent consideration | Level 3 | Lazanda | Selling general and administrative expense
Changes in fair value of all financial liabilities measured at fair value on a recurring basis
Change in fair value			1,060,000
Contingent consideration | Level 3 | CAMBIA
Changes in fair value of all financial liabilities measured at fair value on a recurring basis
Balance at the end of the period	1,010,000		1,243,000
Contingent consideration | Level 3 | CAMBIA | Interest Expense.
Changes in fair value of all financial liabilities measured at fair value on a recurring basis
Change in fair value			$ 233,000