Net Product Sales (Tables)

12 Months Ended

Dec. 31, 2013

Revenues [Abstract]

Sales Related Deductions Activity

The following table summarizes the provisions, and credits/payments, for these sales-related deductions for the years ended December 31, 2013 and 2012; such amounts were not significant during the year ended December 31, 2011.

	Rebates & Chargebacks			Distribution- Related Fees			Other Sales- Related Deductions			Total
Balance as of December 31, 2011	$	585		$	1,451		$	182		$	2,218
Provision related to current period sales	14,153			45,028			3,070			62,251
Credits/payments	(11,755		)	(31,181		)	(2,707		)	(45,643		)
Balance as of December 31, 2012	2,983			15,298			545			18,826
Provision related to current period sales	25,936			62,984			955			89,875
Credits/payments	(24,519		)	(58,619		)	(962		)	(84,100		)
Balance as of December 31, 2013	$	4,400		$	19,663		$	538		$	24,601