Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	[1]	Jun. 30, 2023	Jun. 30, 2022
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ 40,326	$ (143,706)		$ 96,565	$ (342,554)	[1]
Effective Income Tax Rate, Percent				16.25%	26.42%
Federal Statutory Income Tax Rate, Percent				21.00%
Book-income Alternative Minimum Tax Rate				15.00%

[1] Prior period amounts adjusted for the implementation of ASU 2018-12: Targeted Improvements to the Accounting for Long-Duration Contracts.