Annual report pursuant to Section 13 and 15(d)

INCOME TAXES - Narrative (Details)

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INCOME TAXES - Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2021
Dec. 31, 2022
Operating Loss Carryforwards      
Income tax benefit from acquisitions   $ (29.6)  
Operating loss carryforwards, subject to expiration $ 118.1    
Operating loss carryforwards, not subject to expiration 581.9    
Federal and state research and development tax credit carryforwards 10.9    
Federal R&D credit carryforwards 5.9    
Unrecognized tax liability acquired through purchase accounting 0.8    
Accrued interest and penalties 0.1    
Germany      
Operating Loss Carryforwards      
Operating loss carryforwards, not subject to expiration 20.2    
Federal tax      
Operating Loss Carryforwards      
Operating loss carryforwards 700.0   $ 692.8
Federal carryforwards 434.7    
State and local jurisdiction      
Operating Loss Carryforwards      
Operating loss carryforwards 420.8   387.7
Foreign      
Operating Loss Carryforwards      
Operating loss carryforwards $ 23.4   $ 35.4