Product Revenues, Net (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Product Revenue Allowance and Reserve [Roll Forward]
Product revenue allowance and reserve, beginning balance	$ 87,133
Provision related to current period sales	32,215
Adjustments related to prior period sales	7,978
Credits/payments made	(68,634)
Product revenue allowance and reserve, ending balance	58,692
Trade Allowances
Product Revenue Allowance and Reserve [Roll Forward]
Product revenue allowance and reserve, beginning balance	1,535
Provision related to current period sales	4,513
Adjustments related to prior period sales	(8)
Credits/payments made	(5,271)
Product revenue allowance and reserve, ending balance	769
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	26,464
Adjustments related to prior period sales	3,861
Credits/payments made	(57,617)
Product revenue allowance and reserve, ending balance	40,952
Product Returns
Product Revenue Allowance and Reserve [Roll Forward]
Product revenue allowance and reserve, beginning balance	15,799
Provision related to current period sales	379
Adjustments related to prior period sales	4,124
Credits/payments made	(4,160)
Product revenue allowance and reserve, ending balance	16,142
Other Incentives
Product Revenue Allowance and Reserve [Roll Forward]
Product revenue allowance and reserve, beginning balance	1,555
Provision related to current period sales	859
Adjustments related to prior period sales	1
Credits/payments made	(1,586)
Product revenue allowance and reserve, ending balance	$ 829