Goodwill and Other Intangibles - Changes in Goodwill (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Dec. 31, 2024
Goodwill [Roll Forward]
Balance at beginning of period	$ 1,582,714
Foreign currency translation adjustments	88,213
Balance at end of period	1,670,927
Ketjen
Goodwill [Roll Forward]
Accumulated impairment loss	6,800	$ 6,800
Reportable Segments | Energy Storage
Goodwill [Roll Forward]
Balance at beginning of period	1,387,591
Foreign currency translation adjustments	69,475
Balance at end of period	1,457,066
Reportable Segments | Specialties
Goodwill [Roll Forward]
Balance at beginning of period	32,577
Foreign currency translation adjustments	49
Balance at end of period	32,626
Reportable Segments | Ketjen
Goodwill [Roll Forward]
Balance at beginning of period	162,546
Foreign currency translation adjustments	18,689
Balance at end of period	$ 181,235