Income Taxes (Reconciliation Of Income Tax At Effective Income Tax Rate) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Income tax expense at federal statutory rate	$ (164,266)	$ (157,551)	$ (159,343)
State taxes, net of federal benefit	(25,527)	(23,167)	(20,573)
Differences between statutory rate and foreign effective tax rate	23,255	27,691	25,178
Intellectual property transfer deferred tax asset	165,517	0	0
Effective tax rate reconciliation, accrual for uncertain tax positions	(5,095)	(204,673)	7,365
Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-based Payment Arrangement, Amount	1,333	(8,643)	(9,204)
Other	(130)	4,355	6,422
Income tax (expense) benefit	$ (2,611)	$ (64,644)	$ 146,477