Supplemental Financial Information (Schedule of Components of Other Operating (Income) Expense, Net) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
UTIS fire
Fixed assets write-offs	$ 0	$ 1,073	$ 0
Inventory charges	197	874	0
Professional services	1,449	2,771	0
Lease obligations	437	994	0
Lease impairments	0	495	0
Compensation & benefits	2,420	2,072	0
Third-party property claims	0	4,650	0
Other	(262)	155	0
Insurance recoveries	(6,646)	(6,874)	0
Total UTIS fire	(2,405)	6,210	0
Regulatory termination fee, net	(142,069)	0	0
Loss (gain) on sale or disposal of property, plant and equipment	460	(880)	41
Economic incentive grants	0	0	(145)
Total other operating (income) expense, net	$ (144,014)	$ 5,330	$ (104)