Revenue Recognition - Summarize Activity of the Net Product Revenue Allowance and Reserve Categories (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025
Valuation And Qualifying Accounts Disclosure [Line Items]
Beginning balance	$ 123,247	$ 113,241
Provision related to current period sales	618,292	571,535
Provision related to prior period sales	3,405	562
Credits/payments made for current period sales	(500,586)	(463,740)
Credits/payments made for prior period sales	(123,916)	(110,431)
Ending balance	120,442	111,167
Trade Allowances
Valuation And Qualifying Accounts Disclosure [Line Items]
Beginning balance	17,189	9,433
Provision related to current period sales	58,806	56,169
Credits/payments made for current period sales	(44,013)	(44,049)
Credits/payments made for prior period sales	(16,462)	(8,779)
Ending balance	15,520	12,774
Rebates, Chargebacks and Discounts
Valuation And Qualifying Accounts Disclosure [Line Items]
Beginning balance	102,257	97,526
Provision related to current period sales	550,664	504,168
Provision related to prior period sales	176	562
Credits/payments made for current period sales	(450,404)	(411,114)
Credits/payments made for prior period sales	(101,595)	(96,717)
Ending balance	101,098	94,425
Product Returns
Valuation And Qualifying Accounts Disclosure [Line Items]
Beginning balance	2,541	4,734
Provision related to current period sales	1,353	1,301
Provision related to prior period sales	3,229
Credits/payments made for current period sales	0	(81)
Credits/payments made for prior period sales	(4,264)	(3,232)
Ending balance	2,859	2,722
Other Incentives
Valuation And Qualifying Accounts Disclosure [Line Items]
Beginning balance	1,260	1,548
Provision related to current period sales	7,469	9,897
Credits/payments made for current period sales	(6,169)	(8,496)
Credits/payments made for prior period sales	(1,595)	(1,703)
Ending balance	$ 965	$ 1,246