Goodwill and Other Intangible Assets - Additional Information (Detail) $ in Thousands		3 Months Ended		6 Months Ended
	Feb. 09, 2022 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) product	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Goodwill [Line Items]
Goodwill		$ 600,974		$ 600,974		$ 593,017	$ 522,814
Intangible assets acquired			$ 73,800		$ 73,800
In-process research and development		405,425		405,425		405,425
Product rights
Goodwill [Line Items]
Intangible assets acquired					29,500
In-process research and development
Goodwill [Line Items]
Intangible assets acquired					44,300
Impairment charges		5,100	$ 700	$ 5,100	$ 700
Number of products impaired | product				1
Saol Baclofen Franchise Acquisition
Goodwill [Line Items]
Intangible assets	$ 83,815			$ 83,800
Specialty
Goodwill [Line Items]
Goodwill		366,300		366,300		363,900
Generics
Goodwill [Line Items]
Goodwill		165,200		165,200		159,600
AvKARE
Goodwill [Line Items]
Goodwill		$ 69,500		$ 69,500		$ 69,500