Product Revenues, Net (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Product Revenue Allowance and Reserve [Roll Forward]
Product revenue allowance and reserve, beginning balance	$ 75,393
Provision related to current period sales	68,152
Adjustments related to prior period sales	9,822
Credits/payments made	(67,752)
Product revenue allowance and reserve, ending balance	85,615
Trade Allowances [Member]
Product Revenue Allowance and Reserve [Roll Forward]
Product revenue allowance and reserve, beginning balance	5,416
Provision related to current period sales	11,226
Adjustments related to prior period sales	107
Credits/payments made	(11,728)
Product revenue allowance and reserve, ending balance	5,021
Rebates Chargebacks and Discounts [Member]
Product Revenue Allowance and Reserve [Roll Forward]
Product revenue allowance and reserve, beginning balance	63,560
Provision related to current period sales	52,334
Adjustments related to prior period sales	1,644
Credits/payments made	(51,132)
Product revenue allowance and reserve, ending balance	66,406
Product Returns [Member]
Product Revenue Allowance and Reserve [Roll Forward]
Product revenue allowance and reserve, beginning balance	2,852
Provision related to current period sales	872
Adjustments related to prior period sales	8,209
Credits/payments made	(1,009)
Product revenue allowance and reserve, ending balance	10,924
Other Incentives [Member]
Product Revenue Allowance and Reserve [Roll Forward]
Product revenue allowance and reserve, beginning balance	3,565
Provision related to current period sales	3,720
Adjustments related to prior period sales	(138)
Credits/payments made	(3,883)
Product revenue allowance and reserve, ending balance	$ 3,264