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Restructuring Charges - Changes to Restructuring Liability by Major Restructuring Activity (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Restructuring Cost And Reserve [Line Items]    
Beginning balance $ 3,012  
Restructuring charges 116 $ 453
Cash payments (234)  
Adjustment to liability (7)  
Ending balance 2,887  
GES | Severance & Employee Benefits    
Restructuring Cost And Reserve [Line Items]    
Beginning balance 1,634  
Restructuring charges 103  
Cash payments (200)  
Adjustment to liability 0  
Ending balance 1,537  
GES | Facilities    
Restructuring Cost And Reserve [Line Items]    
Beginning balance 1,378  
Restructuring charges 13  
Cash payments (34)  
Adjustment to liability (7)  
Ending balance 1,350  
Other Restructuring | Severance & Employee Benefits    
Restructuring Cost And Reserve [Line Items]    
Beginning balance 0  
Restructuring charges 0  
Cash payments 0  
Adjustment to liability 0  
Ending balance $ 0