Revenue Recognition - Summarize Activity of the Net Product Revenue Allowance and Reserve Categories (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Valuation And Qualifying Accounts Disclosure [Line Items]
Beginning balance	$ 171,501	$ 191,521
Provision related to current period sales	661,470	613,701
Provision related to prior period sales	(2,111)	(15,257)
Credits/payments made for current period sales	(542,351)	(485,808)
Credits/payments made for prior period sales	(160,109)	(119,913)
Ending balance	128,400	184,244
Trade Allowances
Valuation And Qualifying Accounts Disclosure [Line Items]
Beginning balance	18,834	44,626
Provision related to current period sales	62,211	67,003
Credits/payments made for current period sales	(50,145)	(30,450)
Credits/payments made for prior period sales	(18,383)	(42,389)
Ending balance	12,517	38,790
Rebates, Chargebacks and Discounts
Valuation And Qualifying Accounts Disclosure [Line Items]
Beginning balance	143,033	136,093
Provision related to current period sales	589,133	531,700
Provision related to prior period sales	(2,111)	(15,113)
Credits/payments made for current period sales	(484,127)	(442,673)
Credits/payments made for prior period sales	(136,588)	(75,297)
Ending balance	109,340	134,710
Product Returns
Valuation And Qualifying Accounts Disclosure [Line Items]
Beginning balance	7,732	8,746
Provision related to current period sales	1,459	1,634
Provision related to prior period sales		(250)
Credits/payments made for current period sales	(167)	(953)
Credits/payments made for prior period sales	(3,152)	(1,219)
Ending balance	5,872	7,958
Other Incentives
Valuation And Qualifying Accounts Disclosure [Line Items]
Beginning balance	1,902	2,056
Provision related to current period sales	8,667	13,364
Provision related to prior period sales		106
Credits/payments made for current period sales	(7,912)	(11,732)
Credits/payments made for prior period sales	(1,986)	(1,008)
Ending balance	$ 671	$ 2,786