Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Line Items]
Goodwill	$ 598,549,000		$ 598,629,000	$ 598,853,000
Amortization of intangible assets	39,900,000	$ 41,100,000
Intangible asset impairment charges, indefinite-lived	0	$ 0
Specialty
Goodwill [Line Items]
Goodwill	366,300,000		366,300,000
Generics
Goodwill [Line Items]
Goodwill	162,700,000		162,800,000
AvKARE
Goodwill [Line Items]
Goodwill	$ 69,500,000		$ 69,500,000