GOODWILL AND INTANGIBLE ASSETS - Components (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Definite-Lived Intangible Assets:
Gross Carrying Amount	$ 480,915		$ 480,915
Accumulated Amortization	$ (268,699)		(255,855)
Remaining Weighted Average Amortization Period	4 years 10 months 24 days
Indefinite-Lived Intangible Assets:
Total Intangible Assets, Gross	$ 507,490		507,490
Intangible asset impairment charge	0	$ 0
Amortization of intangible assets	$ 12,800	$ 12,500
Minimum
Definite-Lived Intangible Assets:
Weighted Average Amortization Period	7 years
Maximum
Definite-Lived Intangible Assets:
Weighted Average Amortization Period	10 years
In process research and development
Indefinite-Lived Intangible Assets:
Gross Carrying Amount	$ 26,575		26,575
Acquired ANDAs intangible assets
Definite-Lived Intangible Assets:
Gross Carrying Amount	195,862		195,862
Accumulated Amortization	$ (81,630)		(75,606)
Remaining Weighted Average Amortization Period	5 years 7 months 6 days
NDAs and product rights
Definite-Lived Intangible Assets:
Gross Carrying Amount	$ 242,372		242,372
Accumulated Amortization	$ (167,856)		(162,188)
Remaining Weighted Average Amortization Period	3 years 8 months 12 days
Marketing and distribution rights
Definite-Lived Intangible Assets:
Gross Carrying Amount	$ 17,157		17,157
Accumulated Amortization	$ (13,550)		(13,309)
Remaining Weighted Average Amortization Period	3 years 9 months 18 days
Non-compete agreement
Definite-Lived Intangible Assets:
Gross Carrying Amount	$ 624		624
Accumulated Amortization	(624)		(602)
Customer relationships
Definite-Lived Intangible Assets:
Gross Carrying Amount	24,900		24,900
Accumulated Amortization	$ (5,039)		$ (4,150)
Remaining Weighted Average Amortization Period	5 years 7 months 6 days