Revenue Recognition - Total Gross Product (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Provision for product sales allowances and accruals:
Revenues	$ 68,661	$ 75,804
Product Revenue
Disaggregation of Revenue [Line Items]
Gross product sales	232,741	211,718
Provision for product sales allowances and accruals:
Contractual adjustments	143,175	108,884
Governmental rebates	20,938	27,105
Total	164,113	135,989
Revenues	$ 68,628	$ 75,729