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Debt and Other Obligations - Term Loan (Details) - Term Loan
€ in Millions, $ in Millions
1 Months Ended 12 Months Ended
Mar. 16, 2022
USD ($)
Aug. 31, 2021
Sep. 30, 2021
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2025
USD ($)
Mar. 16, 2022
CNY (¥)
Sep. 30, 2021
EUR (€)
Dec. 31, 2014
EUR (€)
Line of Credit Facility [Line Items]                  
Term loan         $ 895.0        
Required repayment per annum (at least) (as a percent)     1.00%   1.00%        
Emission reduction targets       0.10%          
Credit spread reduction       0.10%          
Achievement of targets prospective period       12 months          
Margin step-up for failure to achieve one target       0.05%          
Margin step-up for failure to achieve both targets       0.10%          
Debt issuance costs, gross     $ 7.8            
Debt issuance costs, net     2.8            
Debt related commitment fees     $ 5.0            
Orion Engineered Carbons (Huaibei) Co., Ltd                  
Line of Credit Facility [Line Items]                  
Term of loan (in years) 8 years                
Euro-denominated Term Loan                  
Line of Credit Facility [Line Items]                  
Basis spread on variable rate     2.50%            
Variable rate basis floor         1.00%        
Euro-denominated Term Loan | Minimum                  
Line of Credit Facility [Line Items]                  
Basis spread on variable rate         3.75%        
Euro-denominated Term Loan | Maximum                  
Line of Credit Facility [Line Items]                  
Basis spread on variable rate         4.00%        
Formerly LIBOR                  
Line of Credit Facility [Line Items]                  
Basis spread on variable rate     2.25%            
Variable rate basis floor     0.50%            
U.S. dollars denominated Term Loan                  
Line of Credit Facility [Line Items]                  
Term loan     $ 300.0   $ 358.0        
U.S. dollars denominated Term Loan | Formerly LIBOR                  
Line of Credit Facility [Line Items]                  
Basis spread on variable rate   2.00% 2.25%            
Euro-denominated Term Loan                  
Line of Credit Facility [Line Items]                  
Term loan | €               € 300.0 € 399.0
China Term Loan                  
Line of Credit Facility [Line Items]                  
China Term Loan       $ 50.2   $ 39.3      
China Term Loan | Orion Engineered Carbons (Huaibei) Co., Ltd                  
Line of Credit Facility [Line Items]                  
Term loan $ 71.0           ¥ 500,000,000    
Debt interest (as a percent) 4.50%           4.50%    
Principal repayments year two (as a percent) 2.00%                
Principal repayments year three (as a percent) 10.00%                
Principal repayments annual after year three (as a percent) 22.00%                
China Term Loan           $ 52.4