GOODWILL AND INTANGIBLE ASSETS - Narrative (Details)				3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 17, 2025 USD ($)	Sep. 16, 2024 USD ($)	Jun. 19, 2024	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($) intangibleAsset	Jun. 30, 2025 USD ($)
Finite-Lived Intangible Assets [Line Items]
Number of intangible assets acquired | intangibleAsset								2
Royalty payment percentage			3.125%
Buyout period			6 months
Payments for royalties	$ 17,300,000
Amortization of intangible assets				$ 20,400,000	$ 13,900,000	$ 62,200,000	$ 39,800,000
Gross carrying amount				929,785,000		929,785,000		$ 893,825,000
Impairment of indefinite lived intangible assets				800,000	$ 0	800,000	$ 0
Buy Out Option
Finite-Lived Intangible Assets [Line Items]
Remaining estimated useful lives	12 years
Acquired ANDAs intangible assets
Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired				700,000
Gross carrying amount				$ 214,174,000		$ 214,174,000		$ 210,497,000
Acquired ANDAs intangible assets | Reclassification Of Assets On Completion Of Project And Launch Of Related Products
Finite-Lived Intangible Assets [Line Items]
Remaining estimated useful lives									10 years
Acquired ANDAs intangible assets | In process research and development | Reclassification Of Assets On Completion Of Project And Launch Of Related Products
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount									$ 15,800,000
Alimera Sciences, Inc
Finite-Lived Intangible Assets [Line Items]
Remaining estimated useful lives								12 years
Alimera Sciences, Inc | YUTIQ
Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired		$ 170,000						$ 170,000,000
Remaining estimated useful lives		12 years
Alimera Sciences, Inc | ILUVIEN
Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired		$ 230,000						$ 230,000,000
Remaining estimated useful lives		12 years