Product Revenues, Net (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Product Revenue Allowance and Reserve [Roll Forward]
Product revenue allowance and reserve, beginning balance	$ 75,393
Provision related to current period sales	193,701
Adjustments related to prior period sales	15,678
Credits/payments made	(196,285)
Product revenue allowance and reserve, ending balance	88,487
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	26,584
Adjustments related to prior period sales	348
Credits/payments made	(29,960)
Product revenue allowance and reserve, ending balance	2,388
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	155,269
Adjustments related to prior period sales	4,433
Credits/payments made	(153,035)
Product revenue allowance and reserve, ending balance	70,227
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	3,687
Adjustments related to prior period sales	11,125
Credits/payments made	(3,649)
Product revenue allowance and reserve, ending balance	14,015
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	8,161
Adjustments related to prior period sales	(228)
Credits/payments made	(9,641)
Product revenue allowance and reserve, ending balance	$ 1,857