Goodwill and Intangible Assets - Cost, accumulated amortization, and carrying amount of intangible assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 130,094
Cost	956,170	$ 521,170
Accumulated amortization	(308,871)	(252,447)
Carrying Amount	$ 647,299	268,723
Nucynta Products
Finite-Lived Intangible Assets [Line Items]
Amortization Period (Years)	8 years
Cost	$ 521,170	521,170
Accumulated amortization	(286,038)	(252,447)
Carrying Amount	$ 235,132	$ 268,723
Belbuca
Finite-Lived Intangible Assets [Line Items]
Amortization Period (Years)	4 years 9 months 18 days
Cost	$ 360,000
Accumulated amortization	(20,733)
Carrying Amount	$ 339,267
Symproic
Finite-Lived Intangible Assets [Line Items]
Amortization Period (Years)	9 years 7 months 6 days
Cost	$ 70,000
Accumulated amortization	(2,003)
Carrying Amount	$ 67,997
Elyxyb
Finite-Lived Intangible Assets [Line Items]
Amortization Period (Years)	14 years 2 months 12 days
Cost	$ 5,000
Accumulated amortization	(97)
Carrying Amount	$ 4,903