Revenue Recognition - Product Revenue Allowance and Accrual Activity (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
Contractual Adjustments
Balance at Beginning of Period	$ 95,221
Provisions related to current period sales	147,235
Adjustments related to prior period sales	(4,060)
Payments/returns relating to current period sales	(95,284)
Payments/returns relating to prior period sales	(37,969)
Balance at End of Period	105,143
Governmental Rebates
Balance at Beginning of Period	41,319
Provisions related to current period sales	18,175
Adjustments related to prior period sales	2,762
Payments/returns relating to current period sales	0
Payments/returns relating to prior period sales	(29,646)
Balance at End of Period	32,610
Total
Balance at Beginning of Period	136,540
Provisions related to current period sales	165,410
Adjustments related to prior period sales	(1,298)
Payments/returns relating to current period sales	(95,284)
Payments/returns relating to prior period sales	(67,615)
Balance at End of Period	$ 137,753