Revenue Recognition - Product Revenue Allowance and Accrual Activity (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2020	Mar. 31, 2020
Contractual Adjustments
Balance at Beginning of Period	$ 105,143	$ 95,221
Provisions related to current period sales	111,508	147,235
Adjustments related to prior period sales	(634)	(4,060)
Payments/returns relating to current period sales	(112,821)	(95,284)
Payments/returns relating to prior period sales	(19,484)	(37,969)
Balance at End of Period	83,712	105,143
Governmental Rebates
Balance at Beginning of Period	37,128	47,623
Provisions related to current period sales	19,041	18,175
Adjustments related to prior period sales	378	976
Payments/returns relating to current period sales	(13,913)	0
Payments/returns relating to prior period sales	(10,240)	(29,646)
Balance at End of Period	32,394	37,128
Total
Balance at Beginning of Period	142,271	142,844
Provisions related to current period sales	130,549	165,410
Adjustments related to prior period sales	(256)	(3,084)
Payments/returns relating to current period sales	(126,734)	(95,284)
Payments/returns relating to prior period sales	(29,724)	(67,615)
Balance at End of Period	$ 116,106	$ 142,271