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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Assets and Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Liabilities:    
Contingent consideration, noncurrent $ 12,160 $ 92,900
Recurring basis    
Assets:    
Interest rate swap 219 1,710
Assets 37,748 100,091
Recurring basis | Cash and cash equivalents    
Assets:    
Money market funds 32,094 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 5,435 4,627
Recurring basis | Other long-term liabilities    
Liabilities:    
Contingent consideration, noncurrent 12,160 92,900
Recurring basis | Level 1    
Assets:    
Assets 37,529 98,381
Recurring basis | Level 1 | Cash and cash equivalents    
Assets:    
Money market funds 32,094 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 5,435 4,627
Recurring basis | Level 2    
Assets:    
Interest rate swap 219 1,710
Assets 219 1,710
Recurring basis | Level 3 | Other long-term liabilities    
Liabilities:    
Contingent consideration, noncurrent $ 12,160 $ 92,900