BASIS OF PRESENTATION AND ACCOUNTING POLICIES (Details 2) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Gross U.S. product revenues offset by provisions
Gross U.S. product revenues	$ 277,999,000	$ 250,881,000	$ 796,217,000	$ 716,906,000
Provisions offsetting U.S. product revenues:
Contractual adjustments	(13,249,000)	(13,535,000)	(43,281,000)	(40,516,000)
Governmental rebates	(21,154,000)	(18,992,000)	(56,589,000)	(54,001,000)
Total provisions offsetting product revenues	(34,403,000)	(32,527,000)	(99,870,000)	(94,517,000)
U.S. product revenues, net	243,596,000	218,354,000	696,347,000	622,389,000
Reduction in provision for revenue reserves	$ 6,000,000		$ 14,100,000