Product Revenues, Net (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Product Revenue Allowance and Reserve [Roll Forward]
Product revenue allowance and reserve, beginning balance	$ 75,393
Provision related to current period sales	127,843
Adjustments related to prior period sales	11,839
Credits/payments made	(134,493)
Product revenue allowance and reserve, ending balance	80,582
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	19,880
Adjustments related to prior period sales	348
Credits/payments made	(22,404)
Product revenue allowance and reserve, ending balance	3,240
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	99,540
Adjustments related to prior period sales	3,380
Credits/payments made	(103,142)
Product revenue allowance and reserve, ending balance	63,338
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	2,029
Adjustments related to prior period sales	8,247
Credits/payments made	(2,116)
Product revenue allowance and reserve, ending balance	11,012
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	6,394
Adjustments related to prior period sales	(136)
Credits/payments made	(6,831)
Product revenue allowance and reserve, ending balance	$ 2,992