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SEGMENT INFORMATION - Narrative (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2025 USD ($) segment	Dec. 31, 2024 USD ($)
Concentration Risk And Geographic Information [Line Items]
Number of operating segments | segment	1
Accounts receivable, net	$ 790,266	$ 660,535	[1]
Sanofi
Concentration Risk And Geographic Information [Line Items]
Accounts receivable, net	$ 135,700	$ 96,800
Credit Concentration Risk | Accounts Receivable | Customer One
Concentration Risk And Geographic Information [Line Items]
Concentration risk, percentage	23.00%	20.00%
Credit Concentration Risk | Accounts Receivable | Customer Two
Concentration Risk And Geographic Information [Line Items]
Concentration risk, percentage		11.00%
[1] (1)December 31, 2024 balances were derived from the audited Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2024, filed with the SEC on February 24, 2025.

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Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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