Annual report [Section 13 and 15(d), not S-K Item 405]

Stockholders' Equity - Change by Component (Details)

v3.25.4
Stockholders' Equity - Change by Component (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax      
Beginning balance $ 700,460 $ 705,464 $ 707,229
Other comprehensive income (loss) before reclassifications 9,573 6,477  
Amounts reclassified from AOCI (5,970) (12,926)  
Disposal of Advanced Materials & Catalysts 7,075    
Total other comprehensive income (loss) 10,678 (6,449) (6,950)
Ending balance 603,440 700,460 705,464
Accum. other comp. income (loss)      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax      
Beginning balance (7,407) (958) 5,992
Total other comprehensive income (loss) 10,678 (6,449) (6,950)
Ending balance 3,271 (7,407) (958)
Benefit plans, net      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax      
Beginning balance 1,467 612  
Other comprehensive income (loss) before reclassifications 987 883  
Amounts reclassified from AOCI (4) (28)  
Disposal of Advanced Materials & Catalysts 0    
Total other comprehensive income (loss) 983 855 1,120
Ending balance 2,450 1,467 612
Net loss from hedging activities      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax      
Beginning balance 9,902 12,546  
Other comprehensive income (loss) before reclassifications (3,115) 10,254  
Amounts reclassified from AOCI (5,966) (12,898)  
Disposal of Advanced Materials & Catalysts 0    
Total other comprehensive income (loss) (9,081) (2,644) (12,126)
Ending balance 821 9,902 12,546
Foreign currency translation       
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax      
Beginning balance (18,776) (14,116)  
Other comprehensive income (loss) before reclassifications 11,701 (4,660)  
Amounts reclassified from AOCI 0 0  
Disposal of Advanced Materials & Catalysts 7,075    
Total other comprehensive income (loss) 18,776 (4,660) 4,056
Ending balance $ 0 $ (18,776) $ (14,116)