Business and Basis of Presentation (Narrative) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) subsidiary	Sep. 30, 2022 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number Of Subsidiaries | subsidiary			1
Adoption of ASU 2018-12 for LDTI			Accounting Standards Update 2018-12 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
INCOME (LOSS) FROM OPERATIONS BEFORE INCOME TAXES AND EQUITY IN EARNINGS OF OPERATING JOINT VENTURE	$ (548,806)	$ 12,740	$ 45,368	$ (1,283,881)
Out of period adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
INCOME (LOSS) FROM OPERATIONS BEFORE INCOME TAXES AND EQUITY IN EARNINGS OF OPERATING JOINT VENTURE		$ (73,000)		$ (72,000)