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DEBT AND FINANCING ARRANGEMENTS - Net Carrying Amount of Liability Component (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Debt Instrument [Line Items]    
Long-term Debt, Total $ 257,139 $ 226,047
2020 Convertible Senior Notes    
Debt Instrument [Line Items]    
Long-term Debt, Gross 230,000 230,000
Debt Issuance Costs, Net 2,860 3,953
Long-term Debt, Total $ 227,140 $ 226,047