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Segment Information - Schedule of Capital Expenditures and Identifiable Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Segment Reporting Information [Line Items]
Capital Expenditures	$ 58,012	$ 74,044
Identifiable Assets	3,696,794		$ 3,652,082
Operating Segments | Electric
Segment Reporting Information [Line Items]
Capital Expenditures	52,127	61,866
Identifiable Assets	2,814,226		2,785,522
Operating Segments | Manufacturing
Segment Reporting Information [Line Items]
Capital Expenditures	2,289	5,495
Identifiable Assets	256,143		254,445
Operating Segments | Plastics
Segment Reporting Information [Line Items]
Capital Expenditures	3,584	6,673
Identifiable Assets	209,737		186,043
Corporate
Segment Reporting Information [Line Items]
Capital Expenditures	12	$ 10
Identifiable Assets	$ 416,688		$ 426,072

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