Segment Information - Identifiable Assets by Reportable Segments (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Segment Reporting Information [Line Items]
Total assets	$ 17,291,927	$ 16,609,649
Total investments in equity method investees	820,925	726,484
Reportable Segments
Segment Reporting Information [Line Items]
Total assets	14,905,929	14,555,600
Reportable Segments | Energy Storage
Segment Reporting Information [Line Items]
Total assets	11,352,593	11,285,847
Total investments in equity method investees	663,219	585,569
Reportable Segments | Specialties
Segment Reporting Information [Line Items]
Total assets	2,016,135	1,843,564
Reportable Segments | Ketjen
Segment Reporting Information [Line Items]
Total assets	1,537,201	1,426,189
Total investments in equity method investees	157,706	140,915
Corporate
Segment Reporting Information [Line Items]
Total assets	$ 2,385,998	$ 2,054,049