FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Liabilities:
Contingent consideration, noncurrent	$ 104,070	$ 92,900
Recurring basis
Assets:
Assets	94,409	100,091
Recurring basis | Cash and cash equivalents
Assets:
Money market funds	88,832	93,754
Recurring basis | Other long-term assets
Assets:
Equity, bond, and money market mutual funds held in trust related to the Voluntary Savings Plan	4,947	4,627
Interest rate swap	630	1,710
Recurring basis | Other long-term liabilities
Liabilities:
Contingent consideration, noncurrent	104,070	92,900
Recurring basis | Level 1
Assets:
Assets	93,779	98,381
Recurring basis | Level 1 | Cash and cash equivalents
Assets:
Money market funds	88,832	93,754
Recurring basis | Level 1 | Other long-term assets
Assets:
Equity, bond, and money market mutual funds held in trust related to the Voluntary Savings Plan	4,947	4,627
Recurring basis | Level 2
Assets:
Assets	630	1,710
Recurring basis | Level 2 | Other long-term assets
Assets:
Interest rate swap	630	1,710
Recurring basis | Level 3 | Other long-term liabilities
Liabilities:
Contingent consideration, noncurrent	$ 104,070	$ 92,900