Business Segment Data - Schedule of Operating Revenues and Operating Assets Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting, Revenue Reconciling Item [Line Items]
External operating revenues	$ 1,757,978	$ 1,803,352	$ 1,747,298
Assets	7,038,818	7,833,159	9,660,781
Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
External operating revenues	1,827,402	1,866,324	1,806,456
Assets	6,892,959	6,564,962	6,061,151
Other
Segment Reporting, Revenue Reconciling Item [Line Items]
External operating revenues	195	119	86
Assets	525,258	1,847,432	4,784,142
Intersegment eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
External operating revenues	(69,619)	(63,091)	(59,244)
Assets	$ (379,399)	$ (579,235)	$ (1,184,512)