Product Revenues, Net (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014
Product Revenue Allowance and Reserve [Roll Forward]
Product revenue allowance and reserve, beginning balance	$ 87,133
Provision related to current period sales	40,393
Adjustments related to prior period sales	2,194
Credits/payments made	(82,672)
Product revenue allowance and reserve, ending balance	47,048
Trade Allowances
Product Revenue Allowance and Reserve [Roll Forward]
Product revenue allowance and reserve, beginning balance	1,535
Provision related to current period sales	6,772
Adjustments related to prior period sales	(8)
Credits/payments made	(7,255)
Product revenue allowance and reserve, ending balance	1,044
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	30,720
Adjustments related to prior period sales	5,052
Credits/payments made	(67,557)
Product revenue allowance and reserve, ending balance	36,459
Product Returns
Product Revenue Allowance and Reserve [Roll Forward]
Product revenue allowance and reserve, beginning balance	15,799
Provision related to current period sales	1,691
Adjustments related to prior period sales	(2,778)
Credits/payments made	(6,052)
Product revenue allowance and reserve, ending balance	8,660
Other Incentives
Product Revenue Allowance and Reserve [Roll Forward]
Product revenue allowance and reserve, beginning balance	1,555
Provision related to current period sales	1,210
Adjustments related to prior period sales	(72)
Credits/payments made	(1,808)
Product revenue allowance and reserve, ending balance	$ 885