Segment and Geographic Area Information - Identifiable Assets by Reportable Segments (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Total assets	$ 16,609,649	$ 18,270,652	$ 15,456,522
Reportable Segments
Segment Reporting Information [Line Items]
Total assets	14,555,600	16,298,462	13,083,014
Reportable Segments | Energy Storage
Segment Reporting Information [Line Items]
Total assets	11,285,847	13,246,412	10,471,949
Reportable Segments | Specialties
Segment Reporting Information [Line Items]
Total assets	1,843,564	1,696,307	1,396,583
Reportable Segments | Ketjen
Segment Reporting Information [Line Items]
Total assets	1,426,189	1,355,743	1,214,482
Corporate
Segment Reporting Information [Line Items]
Total assets	$ 2,054,049	$ 1,972,190	$ 2,373,508