Income Taxes (Components Of Provision For Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal, Current (expense) benefit	$ (97,420)	$ 123,933	$ (74,283)
State, Current (expense) benefit	(32,188)	(10,522)	(2,069)
Foreign, including foreign withholding tax, Current (expense) benefit	(29,834)	(29,152)	(31,385)
Current (expense) benefit	159,442	(84,259)	107,737
Federal, Deferred (expense) benefit	(3,906)	(4,348)	(30,462)
State, Deferred (expense) benefit	200	(17,388)	(22,899)
Foreign, Deferred (expense) benefit	165,759	2,121	14,621
Deferred (expense) benefit	(162,053)	19,615	38,740
Income tax (expense) benefit	$ (2,611)	$ (64,644)	$ 146,477