v3.26.1
Schedule of Additions to Long-lived Assets and Depreciation and Amortization (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Information [Line Items]        
Segment Reporting, Long-Lived Asset, Expenditure for Addition $ 42,090 $ 21,558 $ 73,685 $ 43,812
Depreciation and amortization 31,799 28,492 63,461 57,270
Operating Segments [Member] | Petroleum Additives [Member]        
Segment Information [Line Items]        
Segment Reporting, Long-Lived Asset, Expenditure for Addition 23,157 16,449 39,429 36,723
Depreciation and amortization 18,748 18,700 37,323 37,679
Operating Segments [Member] | All Other [Member]        
Segment Information [Line Items]        
Depreciation and amortization 13 12 35 24
Operating Segments [Member] | Specialty Materials [Member]        
Segment Information [Line Items]        
Segment Reporting, Long-Lived Asset, Expenditure for Addition 18,915 4,139 33,414 5,027
Depreciation and amortization 11,990 8,864 24,152 17,722
Corporate, Non-Segment [Member]        
Segment Information [Line Items]        
Segment Reporting, Long-Lived Asset, Expenditure for Addition 18 970 842 2,062
Depreciation and amortization $ 1,048 $ 916 $ 1,951 $ 1,845