Product Revenues, Net (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($)
Product Revenue Allowance and Reserve [Roll Forward]
Balance at December 31, 2015	$ 49,296
Provision related to current period sales	80,509
Adjustments related to prior period sales	(1,989)
Credits/payments made	(58,773)
Balance at June 30, 2016	69,043
Trade Allowances
Product Revenue Allowance and Reserve [Roll Forward]
Balance at December 31, 2015	2,089
Provision related to current period sales	9,935
Adjustments related to prior period sales	(77)
Credits/payments made	(9,762)
Balance at June 30, 2016	2,185
Rebates, Chargebacks and Discounts
Product Revenue Allowance and Reserve [Roll Forward]
Balance at December 31, 2015	44,669
Provision related to current period sales	65,066
Adjustments related to prior period sales	(1,712)
Credits/payments made	(44,113)
Balance at June 30, 2016	63,910
Product Returns
Product Revenue Allowance and Reserve [Roll Forward]
Balance at December 31, 2015	1,228
Provision related to current period sales	1,288
Adjustments related to prior period sales	(205)
Credits/payments made	(260)
Balance at June 30, 2016	2,051
Other Incentives
Product Revenue Allowance and Reserve [Roll Forward]
Balance at December 31, 2015	1,310
Provision related to current period sales	4,220
Adjustments related to prior period sales	5
Credits/payments made	(4,638)
Balance at June 30, 2016	$ 897