Segment Information - Identifiable Assets by Reportable Segments (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Segment Reporting Information [Line Items]
Total assets	$ 16,999,258	$ 16,609,649
Total investments in equity method investees	735,767	726,484
Reportable Segments
Segment Reporting Information [Line Items]
Total assets	14,665,818	14,555,600
Reportable Segments | Energy Storage
Segment Reporting Information [Line Items]
Total assets	11,360,332	11,285,847
Total investments in equity method investees	585,648	585,569
Reportable Segments | Specialties
Segment Reporting Information [Line Items]
Total assets	1,856,357	1,843,564
Reportable Segments | Ketjen
Segment Reporting Information [Line Items]
Total assets	1,449,129	1,426,189
Total investments in equity method investees	150,119	140,915
Corporate
Segment Reporting Information [Line Items]
Total assets	$ 2,333,440	$ 2,054,049