FINANCIAL INSTRUMENTS - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Assets
Cash and cash equivalents	$ 385,648	$ 325,089
Short-term restricted cash	300	300
Long-term restricted cash	2,422	2,922
Total assets measured at fair value	770,511	775,540
Liabilities
Contingent consideration	18,450	172,094
Total liabilities measured at fair value	18,450	172,094
Investments:
Assets
Investments:	382,141	447,229
Commercial paper
Assets
Investments:	16,771	127,302
Corporate debt securities
Assets
Investments:	75,853	49,491
U.S. government & agency securities
Assets
Investments:	289,517	270,436
Level 1
Assets
Cash and cash equivalents	196,621	137,636
Short-term restricted cash	300	300
Long-term restricted cash	2,422	2,922
Total assets measured at fair value	199,343	140,858
Liabilities
Contingent consideration	0	0
Total liabilities measured at fair value	0	0
Level 1 \| Investments:
Assets
Investments:	0	0
Level 1 \| Commercial paper
Assets
Investments:	0	0
Level 1 \| Corporate debt securities
Assets
Investments:	0	0
Level 1 \| U.S. government & agency securities
Assets
Investments:	0	0
Level 2
Assets
Cash and cash equivalents	189,027	187,453
Short-term restricted cash	0	0
Long-term restricted cash	0	0
Total assets measured at fair value	571,168	634,682
Liabilities
Contingent consideration	0	0
Total liabilities measured at fair value	0	0
Level 2 \| Investments:
Assets
Investments:	382,141	447,229
Level 2 \| Commercial paper
Assets
Investments:	16,771	127,302
Level 2 \| Corporate debt securities
Assets
Investments:	75,853	49,491
Level 2 \| U.S. government & agency securities
Assets
Investments:	289,517	270,436
Level 3
Assets
Cash and cash equivalents	0	0
Short-term restricted cash	0	0
Long-term restricted cash	0	0
Total assets measured at fair value	0	0
Liabilities
Contingent consideration	18,450	172,094
Total liabilities measured at fair value	18,450	172,094
Level 3 \| Investments:
Assets
Investments:	0	0
Level 3 \| Commercial paper
Assets
Investments:	0	0
Level 3 \| Corporate debt securities
Assets
Investments:	0	0
Level 3 \| U.S. government & agency securities
Assets
Investments:	$ 0	$ 0

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Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount of liability recognized arising from contingent consideration in a business combination.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Fair value of financial and nonfinancial obligations.

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Amount of cash restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

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Amount of cash restricted as to withdrawal or usage, classified as noncurrent. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

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