Revenue - Activities and Ending Reserve Balances for Each Significant Category of Discounts and Allowances (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Accounts Notes And Loans Receivable
Activities and reserve balance, beginning balance	$ 109,723	$ 123,398
Provision related to sales made in:
Current period	297,606	348,974
Prior period	(5,868)	(7,558)
Payments and customer credits issued	(305,348)	(350,580)
Activities and reserve balance, ending balance	96,113	114,234
Chargebacks and Discounts for Prompt Payment
Accounts Notes And Loans Receivable
Activities and reserve balance, beginning balance	29,665	40,580
Provision related to sales made in:
Current period	220,178	237,745
Prior period	(2,147)	(2,850)
Payments and customer credits issued	(216,130)	(247,641)
Activities and reserve balance, ending balance	31,566	27,834
Rebates
Accounts Notes And Loans Receivable
Activities and reserve balance, beginning balance	54,004	54,058
Provision related to sales made in:
Current period	38,075	61,190
Prior period	(3,165)	(1,890)
Payments and customer credits issued	(44,816)	(52,213)
Activities and reserve balance, ending balance	44,098	61,145
Other Fees, Co-pay Assistance and Returns
Accounts Notes And Loans Receivable
Activities and reserve balance, beginning balance	26,054	28,760
Provision related to sales made in:
Current period	39,353	50,039
Prior period	(556)	(2,818)
Payments and customer credits issued	(44,402)	(50,726)
Activities and reserve balance, ending balance	$ 20,449	$ 25,255