Product Revenues, Net (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Product Revenue Allowance and Reserve [Roll Forward]
Product revenue allowance and reserve, beginning balance	$ 87,133
Provision related to current period sales	19,598
Adjustments related to prior period sales	6,366
Credits/payments made	(41,440)
Product revenue allowance and reserve, ending balance	71,657
Trade Allowances
Product Revenue Allowance and Reserve [Roll Forward]
Product revenue allowance and reserve, beginning balance	1,535
Provision related to current period sales	2,489
Adjustments related to prior period sales	(10)
Credits/payments made	(3,128)
Product revenue allowance and reserve, ending balance	886
Rebates, Chargebacks and Discounts
Product Revenue Allowance and Reserve [Roll Forward]
Product revenue allowance and reserve, beginning balance	68,244
Provision related to current period sales	16,160
Adjustments related to prior period sales	4,170
Credits/payments made	(34,006)
Product revenue allowance and reserve, ending balance	54,568
Product Returns
Product Revenue Allowance and Reserve [Roll Forward]
Product revenue allowance and reserve, beginning balance	15,799
Provision related to current period sales	349
Adjustments related to prior period sales	2,205
Credits/payments made	(3,311)
Product revenue allowance and reserve, ending balance	15,042
Other Incentives
Product Revenue Allowance and Reserve [Roll Forward]
Product revenue allowance and reserve, beginning balance	1,555
Provision related to current period sales	600
Adjustments related to prior period sales	1
Credits/payments made	(995)
Product revenue allowance and reserve, ending balance	$ 1,161