Product Revenues, Net (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($)
Product Revenue Allowance and Reserve [Roll Forward]
Balance at December 31, 2015	$ 49,296
Provision related to current period sales	40,049
Adjustments related to prior period sales	(2,294)
Credits/payments made	(27,371)
Balance at March 31, 2016	59,680
Trade Allowances
Product Revenue Allowance and Reserve [Roll Forward]
Balance at December 31, 2015	2,089
Provision related to current period sales	4,707
Adjustments related to prior period sales	(38)
Credits/payments made	(4,698)
Balance at March 31, 2016	2,060
Rebates, Chargebacks and Discounts
Product Revenue Allowance and Reserve [Roll Forward]
Balance at December 31, 2015	44,669
Provision related to current period sales	31,138
Adjustments related to prior period sales	(2,181)
Credits/payments made	(19,132)
Balance at March 31, 2016	54,494
Product Returns
Product Revenue Allowance and Reserve [Roll Forward]
Balance at December 31, 2015	1,228
Provision related to current period sales	924
Adjustments related to prior period sales	(75)
Credits/payments made	(260)
Balance at March 31, 2016	1,817
Other Incentives
Product Revenue Allowance and Reserve [Roll Forward]
Balance at December 31, 2015	1,310
Provision related to current period sales	3,280
Adjustments related to prior period sales	0
Credits/payments made	(3,281)
Balance at March 31, 2016	$ 1,309