CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net Income	$ 17,302	$ 293,742	$ 510,340	$ 739,068
Other Comprehensive Income/(Loss), Net of Tax:
Qualified Cash Flow Hedging Instruments	5	5	10	10
Changes in Unrealized (Losses)/Gains on Marketable Securities	0	(505)	1,254	(1,323)
Changes in Funded Status of Pension, SERP and PBOP Benefit Plans	4,083	(793)	6,054	724
Other Comprehensive Income (Loss), Net of Tax	4,088	(1,293)	7,318	(589)
Comprehensive Income Attributable to Noncontrolling Interests	(1,880)	(1,880)	(3,759)	(3,759)
Comprehensive Income Attributable to Common Shareholders	$ 19,510	$ 290,569	$ 513,899	$ 734,720