ACQUISITIONS - Schedule of Assets and Liabilities Acquired (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Nov. 19, 2021	Dec. 31, 2020	Dec. 31, 2019
LIABILITIES ASSUMED
Total liabilities		$ 251,762
Goodwill	$ 145,175		$ 99,547	$ 99,547
Flexion
ASSETS ACQUIRED
Cash and cash equivalents		113,562
Short-term available-for-sale investments		11,153
Accounts receivable		32,838
Inventories		29,667
Prepaid expenses and other assets		4,852
Fixed assets		23,307
Deferred tax assets		58,015
Right-of-use assets		6,585
Identifiable intangible assets		480,000
In-process research and development (IPR&D)		61,000
Total assets		820,979
LIABILITIES ASSUMED
Accounts payable		9,794
Accrued expenses		22,746
Deferred revenue		10,000
Lease liabilities		6,585
Other liabilities		1,187
Long-term debt		201,450
Total identifiable net assets acquired		569,217
Goodwill		9,628
Total consideration transferred		$ 578,845