Acquisitions - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Oct. 10, 2021	Dec. 31, 2020	Jun. 09, 2020
Business Acquisition [Line Items]
Goodwill	$ 117,516		$ 77,911
Adamas Pharmaceuticals
Business Acquisition [Line Items]
Cash and cash equivalents		$ 90,064
Accounts receivable, net		11,156
Inventories		20,200
Prepaid expenses and other current assets		5,077
Property and equipment, net		1,254
Intangible assets		450,100
Other assets		6,442
Total fair value of assets acquired		584,293
Accounts payable		(4,592)
Accrued expenses and other current liabilities		(8,014)
Current debt		(138,315)
Operating lease liability, long term		(5,224)
Deferred income tax liabilities		(56,588)
Total fair value of liabilities assumed		(212,733)
Total identifiable net assets		371,560
Goodwill		39,553
Total purchase price		$ 411,113
USWM Acquisition
Business Acquisition [Line Items]
Cash and cash equivalents				$ 6,994
Accounts receivable, net				18,474
Inventories				11,600
Prepaid expenses and other current assets				3,564
Property and equipment, net				454
Operating lease asset				11,029
Intangible assets				355,000
Other assets				340
Total fair value of assets acquired				407,455
Accounts payable				(2,573)
Accrued expenses and other current liabilities				(23,339)
Operating lease liability				(11,029)
Deferred income tax liabilities				(67,192)
Total fair value of liabilities assumed				(104,133)
Total identifiable net assets				303,322
Goodwill	$ 77,963
Total purchase price				$ 381,285